Number

269

269 is a prime, odd, a calendar year.

Arithmetic Number Ascending Digits Chen Prime Deficient Number Evil Number Prime Pythagorean Prime Recamán's Sequence Sexy Prime Squarefree Twin Prime Year

Historical context — 269 AD

Calendar year

Year 269 (CCLXIX) was a common year starting on Friday of the Julian calendar.

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Historical context — 269 BC

Calendar year

Year 269 BC was a year of the pre-Julian Roman calendar.

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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: Friday
January 1, 269
Ended on: Friday
December 31, 269
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 260s
260–269
Century: 3rd century
201–300
Millennium: 1st millennium
1–1000
Years ago: 1,757
1757 years before 2026.

In other calendars

Hebrew: 4029 / 4030 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Earth zodiac:Ox
Sexagenary cycle position 26 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 812 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 261 / 262 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 191 / 190 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 17
Digit product: 108
Digital root: 8
Palindrome: No
Bit width: 9 bits
Reversed: 962
Recamán's sequence: a(133) = 269
Square (n²): 72,361
Cube (n³): 19,465,109
Divisor count: 2
σ(n) — sum of divisors: 270
φ(n) — Euler's totient: 268

Primality

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

Divisors & multiples

All divisors (2)

1 · 269

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 269)

1 × 269

First multiples

269 · 538 (double) · 807 · 1,076 · 1,345 · 1,614 · 1,883 · 2,152 · 2,421 · 2,690

Sums & aliquot sequence

As a sum of two squares: 10² + 13²

As consecutive integers: 134 + 135

Representations

In words: two hundred sixty-nine
Ordinal: 269th
Roman numeral: CCLXIX
Binary: 100001101
Octal: 415
Hexadecimal: 0x10D
Base64: AQ0=
One's complement: 65,266 (16-bit)

In other bases

ternary (3) 100222

quaternary (4) 10031

quinary (5) 2034

senary (6) 1125

septenary (7) 533

nonary (9) 328

undecimal (11) 225

duodecimal (12) 1a5

tridecimal (13) 179

tetradecimal (14) 153

pentadecimal (15) 12e

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): σξθʹ
Mayan (base 20): 𝋭·𝋩
Chinese: 二百六十九
Chinese (financial): 貳佰陸拾玖

In other modern scripts

Eastern Arabic ٢٦٩ Devanagari २६९ Bengali ২৬৯ Tamil ௨௬௯ Thai ๒๖๙ Tibetan ༢༦༩ Khmer ២៦៩ Lao ໒໖໙ Burmese ၂၆၉

Digit at this position in famous constants

π — Pi (π): Digit 269 = 6
e — Euler's number (e): Digit 269 = 8
φ — Golden ratio (φ): Digit 269 = 2
√2 — Pythagoras's (√2): Digit 269 = 7
ln 2 — Natural log of 2: Digit 269 = 3
γ — Euler-Mascheroni (γ): Digit 269 = 0

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 263 (gap of 6)
Next prime: 271 (gap of 2)

Pair status: twin with 271, sexy with 263.

Unicode codepoint

Latin Small Letter C With Caron

U+010D

Lowercase letter (Ll)

UTF-8 encoding: C4 8D (2 bytes).

Lookup U+010D on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#00010D

RGB(0, 1, 13)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.13.

Address: 0.0.1.13
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.1.13

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

NANP area code 269

The number 269 is an active NANP area code (North American Numbering Plan).

Primary area: Kalamazoo / Battle Creek
Region: Michigan
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 269 ↗