Number

12,689

12,689 is a prime, odd.

Arithmetic Number Ascending Digits Deficient Number Emirp Evil Number Prime Pythagorean Prime Recamán's Sequence Squarefree

Properties

Parity: Odd
Digit count: 5
Digit sum: 26
Digit product: 864
Digital root: 8
Palindrome: No
Bit width: 14 bits
Reversed: 98,621
Recamán's sequence: a(48,897) = 12,689
Square (n²): 161,010,721
Cube (n³): 2,043,065,038,769
Divisor count: 2
σ(n) — sum of divisors: 12,690
φ(n) — Euler's totient: 12,688

Primality

12,689 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 12689

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 12,689)

1 × 12689

First multiples

12,689 · 25,378 (double) · 38,067 · 50,756 · 63,445 · 76,134 · 88,823 · 101,512 · 114,201 · 126,890

Sums & aliquot sequence

As a sum of two squares: 65² + 92²

As consecutive integers: 6,344 + 6,345

Representations

In words: twelve thousand six hundred eighty-nine
Ordinal: 12689th
Binary: 11000110010001
Octal: 30621
Hexadecimal: 0x3191
Base64: MZE=
One's complement: 52,846 (16-bit)

In other bases

ternary (3) 122101222

quaternary (4) 3012101

quinary (5) 401224

senary (6) 134425

septenary (7) 51665

nonary (9) 18358

undecimal (11) 9596

duodecimal (12) 7415

tridecimal (13) 5a11

tetradecimal (14) 48a5

pentadecimal (15) 3b5e

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹 𒌋𒌋𒌋𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵ιβχπθʹ
Mayan (base 20): 𝋡·𝋫·𝋮·𝋩
Chinese: 一萬二千六百八十九
Chinese (financial): 壹萬貳仟陸佰捌拾玖

In other modern scripts

Eastern Arabic ١٢٦٨٩ Devanagari १२६८९ Bengali ১২৬৮৯ Tamil ௧௨௬௮௯ Thai ๑๒๖๘๙ Tibetan ༡༢༦༨༩ Khmer ១២៦៨៩ Lao ໑໒໖໘໙ Burmese ၁၂၆၈၉

Digit at this position in famous constants

π — Pi (π): Digit 12,689 = 9
e — Euler's number (e): Digit 12,689 = 4
φ — Golden ratio (φ): Digit 12,689 = 0
√2 — Pythagoras's (√2): Digit 12,689 = 2
ln 2 — Natural log of 2: Digit 12,689 = 3
γ — Euler-Mascheroni (γ): Digit 12,689 = 3

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 12,671 (gap of 18)
Next prime: 12,697 (gap of 8)

Unicode codepoint

㆑

Ideographic Annotation Reverse Mark

U+3191

Other symbol (So)

UTF-8 encoding: E3 86 91 (3 bytes).

Lookup U+3191 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#003191

RGB(0, 49, 145)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.49.145.

Address: 0.0.49.145
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.49.145

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

Position in π

The digit sequence 12689 first appears in π at position 87,403 of the decimal expansion (the 87,403ordinal-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 12689 on Pi Search ↗