Number

723

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

Arithmetic Number Deficient Number Evil Number Recamán's Sequence Semiprime Squarefree Year

Historical context — 723 AD

Calendar year

Year 723 (DCCXXIII) was a common year starting on Friday of the Julian calendar.

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

Historical context — 723 BC

Decade

This article concerns the period 729 BC – 720 BC.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback 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: Monday
January 1, 723
Ended on: Monday
December 31, 723
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 720s
720–729
Century: 8th century
701–800
Millennium: 1st millennium
1–1000
Years ago: 1,303
1303 years before 2026.

In other calendars

Hebrew: 4483 / 4484 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 104 / 105 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Water zodiac:Pig
Sexagenary cycle position 60 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1266 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 101 / 102 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 715 / 716 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 645 / 644 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 12
Digit product: 42
Digital root: 3
Palindrome: No
Bit width: 10 bits
Reversed: 327
Recamán's sequence: a(233) = 723
Square (n²): 522,729
Cube (n³): 377,933,067
Divisor count: 4
σ(n) — sum of divisors: 968
φ(n) — Euler's totient: 480
Sum of prime factors: 244

Primality

Prime factorization: 3 × 241

Nearest primes: 719 (−4) · 727 (+4)

Divisors & multiples

All divisors (4)

1 · 3 · 241 · 723

Aliquot sum (sum of proper divisors): 245

Factor pairs (a × b = 723)

1 × 723

3 × 241

First multiples

723 · 1,446 (double) · 2,169 · 2,892 · 3,615 · 4,338 · 5,061 · 5,784 · 6,507 · 7,230

Sums & aliquot sequence

As consecutive integers: 361 + 362 240 + 241 + 242 118 + 119 + 120 + 121 + 122 + 123

Aliquot sequence: 723 → 245 → 97 → 1 → 0 — terminates at zero

Representations

In words: seven hundred twenty-three
Ordinal: 723rd
Roman numeral: DCCXXIII
Binary: 1011010011
Octal: 1323
Hexadecimal: 0x2D3
Base64: AtM=
One's complement: 64,812 (16-bit)

In other bases

ternary (3) 222210

quaternary (4) 23103

quinary (5) 10343

senary (6) 3203

septenary (7) 2052

nonary (9) 883

undecimal (11) 5a8

duodecimal (12) 503

tridecimal (13) 438

tetradecimal (14) 399

pentadecimal (15) 333

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹 𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺𓏺𓏺
Greek (Milesian): ψκγʹ
Mayan (base 20): 𝋡·𝋰·𝋣
Chinese: 七百二十三
Chinese (financial): 柒佰貳拾參

In other modern scripts

Eastern Arabic ٧٢٣ Devanagari ७२३ Bengali ৭২৩ Tamil ௭௨௩ Thai ๗๒๓ Tibetan ༧༢༣ Khmer ៧២៣ Lao ໗໒໓ Burmese ၇၂၃

Digit at this position in famous constants

π — Pi (π): Digit 723 = 6
e — Euler's number (e): Digit 723 = 9
φ — Golden ratio (φ): Digit 723 = 9
√2 — Pythagoras's (√2): Digit 723 = 6
ln 2 — Natural log of 2: Digit 723 = 6
γ — Euler-Mascheroni (γ): Digit 723 = 0

Also seen as

Unicode codepoint

Modifier Letter Centred Left Half Ring

U+02D3

Modifier symbol (Sk)

UTF-8 encoding: CB 93 (2 bytes).

Lookup U+02D3 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0002D3

RGB(0, 2, 211)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.211.

Address: 0.0.2.211
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.211

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