Number

913

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

Arithmetic Number Deficient Number Happy Number Odious Number Pernicious Number Recamán's Sequence Semiprime Smith Number Squarefree Year

Historical context — 913 AD

Calendar year

Year 913 (CMXIII) was a common year starting on Friday of the Julian calendar.

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Historical context — 913 BC

Decade

The 910s BC is a decade that lasted from 919 BC to 910 BC.

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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: Sunday
January 1, 913
Ended on: Sunday
December 31, 913
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 910s
910–919
Century: 10th century
901–1000
Millennium: 1st millennium
1–1000
Years ago: 1,113
1113 years before 2026.

In other calendars

Hebrew: 4673 / 4674 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 300 / 301 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Water zodiac:Rooster
Sexagenary cycle position 10 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1456 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 291 / 292 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 905 / 906 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 835 / 834 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 13
Digit product: 27
Digital root: 4
Palindrome: No
Bit width: 10 bits
Reversed: 319
Recamán's sequence: a(509) = 913
Square (n²): 833,569
Cube (n³): 761,048,497
Divisor count: 4
σ(n) — sum of divisors: 1,008
φ(n) — Euler's totient: 820
Sum of prime factors: 94

Primality

Prime factorization: 11 × 83

Nearest primes: 911 (−2) · 919 (+6)

Divisors & multiples

All divisors (4)

1 · 11 · 83 · 913

Aliquot sum (sum of proper divisors): 95

Factor pairs (a × b = 913)

1 × 913

11 × 83

First multiples

913 · 1,826 (double) · 2,739 · 3,652 · 4,565 · 5,478 · 6,391 · 7,304 · 8,217 · 9,130

Sums & aliquot sequence

As consecutive integers: 456 + 457 78 + 79 + … + 88 31 + 32 + … + 52

Aliquot sequence: 913 → 95 → 25 → 6 → 6 — reaches a perfect number

Representations

In words: nine hundred thirteen
Ordinal: 913th
Roman numeral: CMXIII
Binary: 1110010001
Octal: 1621
Hexadecimal: 0x391
Base64: A5E=
One's complement: 64,622 (16-bit)

In other bases

ternary (3) 1020211

quaternary (4) 32101

quinary (5) 12123

senary (6) 4121

septenary (7) 2443

nonary (9) 1224

undecimal (11) 760

duodecimal (12) 641

tridecimal (13) 553

tetradecimal (14) 493

pentadecimal (15) 40d

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓏺𓏺𓏺
Greek (Milesian): ϡιγʹ
Mayan (base 20): 𝋢·𝋥·𝋭
Chinese: 九百一十三
Chinese (financial): 玖佰壹拾參

In other modern scripts

Eastern Arabic ٩١٣ Devanagari ९१३ Bengali ৯১৩ Tamil ௯௧௩ Thai ๙๑๓ Tibetan ༩༡༣ Khmer ៩១៣ Lao ໙໑໓ Burmese ၉၁၃

Digit at this position in famous constants

π — Pi (π): Digit 913 = 8
e — Euler's number (e): Digit 913 = 8
φ — Golden ratio (φ): Digit 913 = 2
√2 — Pythagoras's (√2): Digit 913 = 2
ln 2 — Natural log of 2: Digit 913 = 2
γ — Euler-Mascheroni (γ): Digit 913 = 8

Also seen as

Unicode codepoint

Greek Capital Letter Alpha

U+0391

Uppercase letter (Lu)

UTF-8 encoding: CE 91 (2 bytes).

Lookup U+0391 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000391

RGB(0, 3, 145)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.145.

Address: 0.0.3.145
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.145

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

NANP area code 913

The number 913 is an active NANP area code (North American Numbering Plan).

Primary area: Kansas City suburbs
Region: Kansas
Country: United States

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 913 ↗