Number

12,809

12,809 is a prime, odd.

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

Properties

Parity: Odd
Digit count: 5
Digit sum: 20
Digit product: 0
Digital root: 2
Palindrome: No
Bit width: 14 bits
Reversed: 90,821
Recamán's sequence: a(48,657) = 12,809
Square (n²): 164,070,481
Cube (n³): 2,101,578,791,129
Divisor count: 2
σ(n) — sum of divisors: 12,810
φ(n) — Euler's totient: 12,808

Primality

12,809 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 12809

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 12,809)

1 × 12809

First multiples

12,809 · 25,618 (double) · 38,427 · 51,236 · 64,045 · 76,854 · 89,663 · 102,472 · 115,281 · 128,090

Sums & aliquot sequence

As a sum of two squares: 53² + 100²

As consecutive integers: 6,404 + 6,405

Representations

In words: twelve thousand eight hundred nine
Ordinal: 12809th
Binary: 11001000001001
Octal: 31011
Hexadecimal: 0x3209
Base64: Mgk=
One's complement: 52,726 (16-bit)

In other bases

ternary (3) 122120102

quaternary (4) 3020021

quinary (5) 402214

senary (6) 135145

septenary (7) 52226

nonary (9) 18512

undecimal (11) 9695

duodecimal (12) 74b5

tridecimal (13) 5aa4

tetradecimal (14) 494d

pentadecimal (15) 3bde

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵ιβωθʹ
Mayan (base 20): 𝋡·𝋬·𝋠·𝋩
Chinese: 一萬二千八百零九
Chinese (financial): 壹萬貳仟捌佰零玖

In other modern scripts

Eastern Arabic ١٢٨٠٩ Devanagari १२८०९ Bengali ১২৮০৯ Tamil ௧௨௮௦௯ Thai ๑๒๘๐๙ Tibetan ༡༢༨༠༩ Khmer ១២៨០៩ Lao ໑໒໘໐໙ Burmese ၁၂၈၀၉

Digit at this position in famous constants

π — Pi (π): Digit 12,809 = 1
e — Euler's number (e): Digit 12,809 = 1
φ — Golden ratio (φ): Digit 12,809 = 4
√2 — Pythagoras's (√2): Digit 12,809 = 7
ln 2 — Natural log of 2: Digit 12,809 = 3
γ — Euler-Mascheroni (γ): Digit 12,809 = 0

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 12,799 (gap of 10)
Next prime: 12,821 (gap of 12)

Unicode codepoint

㈉

Parenthesized Hangul Chieuch

U+3209

Other symbol (So)

UTF-8 encoding: E3 88 89 (3 bytes).

Lookup U+3209 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#003209

RGB(0, 50, 9)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.50.9.

Address: 0.0.50.9
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.50.9

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

Position in π

The digit sequence 12809 first appears in π at position 11,363 of the decimal expansion (the 11,363ordinal-suffix:rd digit after the integer 3).

Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.

Look up 12809 on Pi Search ↗