Number

769

769 is a prime, odd, a calendar year.

Arithmetic Number Chen Prime Cousin Prime Deficient Number Emirp Odious Number Pernicious Number Prime Pythagorean Prime Recamán's Sequence Squarefree Year

Historical context — 769 AD

Calendar year

Year 769 (DCCLXIX) was a common year starting on Sunday of the Julian calendar.

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Historical context — 769 BC

Decade

This article concerns the period 769 BC – 760 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: Wednesday
January 1, 769
Ended on: Wednesday
December 31, 769
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 760s
760–769
Century: 8th century
701–800
Millennium: 1st millennium
1–1000
Years ago: 1,257
1257 years before 2026.

In other calendars

Hebrew: 4529 / 4530 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 151 / 152 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Earth zodiac:Rooster
Sexagenary cycle position 46 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1312 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 147 / 148 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 761 / 762 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 691 / 690 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 22
Digit product: 378
Digital root: 4
Palindrome: No
Bit width: 10 bits
Reversed: 967
Recamán's sequence: a(893) = 769
Square (n²): 591,361
Cube (n³): 454,756,609
Divisor count: 2
σ(n) — sum of divisors: 770
φ(n) — Euler's totient: 768

Primality

769 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 769

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 769)

1 × 769

First multiples

769 · 1,538 (double) · 2,307 · 3,076 · 3,845 · 4,614 · 5,383 · 6,152 · 6,921 · 7,690

Sums & aliquot sequence

As a sum of two squares: 12² + 25²

As consecutive integers: 384 + 385

Representations

In words: seven hundred sixty-nine
Ordinal: 769th
Roman numeral: DCCLXIX
Binary: 1100000001
Octal: 1401
Hexadecimal: 0x301
Base64: AwE=
One's complement: 64,766 (16-bit)

In other bases

ternary (3) 1001111

quaternary (4) 30001

quinary (5) 11034

senary (6) 3321

septenary (7) 2146

nonary (9) 1044

undecimal (11) 63a

duodecimal (12) 541

tridecimal (13) 472

tetradecimal (14) 3cd

pentadecimal (15) 364

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ψξθʹ
Mayan (base 20): 𝋡·𝋲·𝋩
Chinese: 七百六十九
Chinese (financial): 柒佰陸拾玖

In other modern scripts

Eastern Arabic ٧٦٩ Devanagari ७६९ Bengali ৭৬৯ Tamil ௭௬௯ Thai ๗๖๙ Tibetan ༧༦༩ Khmer ៧៦៩ Lao ໗໖໙ Burmese ၇၆၉

Digit at this position in famous constants

π — Pi (π): Digit 769 = 8
e — Euler's number (e): Digit 769 = 5
φ — Golden ratio (φ): Digit 769 = 5
√2 — Pythagoras's (√2): Digit 769 = 2
ln 2 — Natural log of 2: Digit 769 = 8
γ — Euler-Mascheroni (γ): Digit 769 = 7

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 761 (gap of 8)
Next prime: 773 (gap of 4)

Pair status: cousin with 773.

Unicode codepoint

Combining Acute Accent

U+0301

Non-spacing mark (Mn)

UTF-8 encoding: CC 81 (2 bytes).

Lookup U+0301 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000301

RGB(0, 3, 1)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.1.

Address: 0.0.3.1
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.1

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