Number

923

923 is a composite number, odd, a calendar year.

923 (nine hundred twenty-three) is an odd 3-digit number. It is a composite number with 4 divisors, and factors as 13 × 71. Written other ways, in Roman numerals it is CMXXIII and in binary, 1110011011.

Arithmetic Number Cube-Free Deficient Number Happy Number Odious Number Pernicious Number Recamán's Sequence Semiprime Squarefree Year

Interestingness

★ ★ ★ ★ ☆

6 notable facts · grade B

911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935

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Historical context — 923 AD

Calendar year

Year 923 (CMXXIII) was a common year starting on Wednesday of the Julian calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →

Historical context — 923 BC

Decade

The 920s BC is a decade that lasted from 929 BC to 920 BC.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 Read the full article on Wikipedia →

Year facts

Year type: Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
Days in year: 365
ISO weeks: 52
Started on: Friday
January 1, 923
Ended on: Friday
December 31, 923
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 920s
920–929
Century: 10th century
901–1000
Millennium: 1st millennium
1–1000
Years ago: 1,103
1103 years before 2026.

In other calendars

Hebrew: 4683 / 4684 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 310 / 311 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Water zodiac:Goat
Sexagenary cycle position 20 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1466 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 301 / 302 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 915 / 916 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 845 / 844 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 14
Digit product: 54
Digital root: 5
Palindrome: No
Bit width: 10 bits
Reversed: 329
Recamán's sequence: a(597) = 923
Square (n²): 851,929
Cube (n³): 786,330,467
Divisor count: 4
σ(n) — sum of divisors: 1,008
φ(n) — Euler's totient: 840
Sum of prime factors: 84

Primality

Prime factorization: 13 × 71

Nearest primes: 919 (−4) · 929 (+6)

Divisors & multiples

All divisors (4)

1 · 13 · 71 · 923

Aliquot sum (sum of proper divisors): 85

Factor pairs (a × b = 923)

1 × 923

13 × 71

First multiples

923 · 1,846 (double) · 2,769 · 3,692 · 4,615 · 5,538 · 6,461 · 7,384 · 8,307 · 9,230

Sums & aliquot sequence

As consecutive integers: 461 + 462 65 + 66 + … + 77 23 + 24 + … + 48

Aliquot sequence: 923 → 85 → 23 → 1 → 0 — terminates at zero

Continued fraction of √n

√923 = [30; (2, 1, 1, 1, 2, 60)]

Period length 6 — the block in parentheses repeats forever.

Representations

In words: nine hundred twenty-three
Ordinal: 923rd
Roman numeral: CMXXIII
Binary: 1110011011
Octal: 1633
Hexadecimal: 0x39B
Base64: A5s=
One's complement: 64,612 (16-bit)
Scientific notation: 9.23 × 10²
As a duration: 923 s = 15 minutes, 23 seconds

In other bases

ternary (3) 1021012

quaternary (4) 32123

quinary (5) 12143

senary (6) 4135

septenary (7) 2456

nonary (9) 1235

undecimal (11) 76a

duodecimal (12) 64b

tridecimal (13) 560

tetradecimal (14) 49d

pentadecimal (15) 418

Palindromic in base 4

As an angle

923° = 2 × 360° + 203°

203° ≈ 3.543 rad

Compass bearing: SSW (south-southwest)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺
Greek (Milesian): ϡκγʹ
Mayan (base 20): 𝋢·𝋦·𝋣
Chinese: 九百二十三
Chinese (financial): 玖佰貳拾參

In other modern scripts

Eastern Arabic ٩٢٣ Devanagari ९२३ Bengali ৯২৩ Tamil ௯௨௩ Thai ๙๒๓ Tibetan ༩༢༣ Khmer ៩២៣ Lao ໙໒໓ Burmese ၉၂၃

Digit at this position in famous constants

π — Pi (π): Digit 923 = 1
e — Euler's number (e): Digit 923 = 5
φ — Golden ratio (φ): Digit 923 = 6
√2 — Pythagoras's (√2): Digit 923 = 5
ln 2 — Natural log of 2: Digit 923 = 9
γ — Euler-Mascheroni (γ): Digit 923 = 9

Also seen as

Unicode codepoint

Greek Capital Letter Lamda

U+039B

Uppercase letter (Lu)

UTF-8 encoding: CE 9B (2 bytes).

Lookup U+039B on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00039B

RGB(0, 3, 155)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.155.

Address: 0.0.3.155
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.155

Unspecified address (0.0.0.0/8) — "this network" placeholder.

Musical pitch

Heard as a frequency, 923 Hz is closest to:

Concert pitch (A4 = 440 Hz): A♯5 (932.3 Hz, -17¢)
Scientific pitch (C4 = 256 Hz): A♯5 (912.3 Hz, +20¢)
Baroque pitch (A4 = 415 Hz): B5 (931.6 Hz, -16¢)