Number

31,139

31,139 is a prime, odd.

Arithmetic Number Deficient Number Emirp Odious Number Prime Recamán's Sequence Safe Prime Squarefree

Properties

Parity: Odd
Digit count: 5
Digit sum: 17
Digit product: 81
Digital root: 8
Palindrome: No
Bit width: 15 bits
Reversed: 93,113
Recamán's sequence: a(31,385) = 31,139
Square (n²): 969,637,321
Cube (n³): 30,193,536,538,619
Divisor count: 2
σ(n) — sum of divisors: 31,140
φ(n) — Euler's totient: 31,138

Primality

31,139 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 31139

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 31,139)

1 × 31139

First multiples

31,139 · 62,278 (double) · 93,417 · 124,556 · 155,695 · 186,834 · 217,973 · 249,112 · 280,251 · 311,390

Sums & aliquot sequence

As consecutive integers: 15,569 + 15,570

Representations

In words: thirty-one thousand one hundred thirty-nine
Ordinal: 31139th
Binary: 111100110100011
Octal: 74643
Hexadecimal: 0x79A3
Base64: eaM=
One's complement: 34,396 (16-bit)

In other bases

ternary (3) 1120201022

quaternary (4) 13212203

quinary (5) 1444024

senary (6) 400055

septenary (7) 156533

nonary (9) 46638

undecimal (11) 21439

duodecimal (12) 1602b

tridecimal (13) 11234

tetradecimal (14) b4c3

pentadecimal (15) 935e

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓆼𓍢𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵λαρλθʹ
Mayan (base 20): 𝋣·𝋱·𝋰·𝋳
Chinese: 三萬一千一百三十九
Chinese (financial): 參萬壹仟壹佰參拾玖

In other modern scripts

Eastern Arabic ٣١١٣٩ Devanagari ३११३९ Bengali ৩১১৩৯ Tamil ௩௧௧௩௯ Thai ๓๑๑๓๙ Tibetan ༣༡༡༣༩ Khmer ៣១១៣៩ Lao ໓໑໑໓໙ Burmese ၃၁၁၃၉

Digit at this position in famous constants

π — Pi (π): Digit 31,139 = 0
e — Euler's number (e): Digit 31,139 = 2
φ — Golden ratio (φ): Digit 31,139 = 7
√2 — Pythagoras's (√2): Digit 31,139 = 6
ln 2 — Natural log of 2: Digit 31,139 = 2
γ — Euler-Mascheroni (γ): Digit 31,139 = 2

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 31,123 (gap of 16)
Next prime: 31,147 (gap of 8)

Unicode codepoint

禣

CJK Unified Ideograph-79A3

U+79A3

Other letter (Lo)

UTF-8 encoding: E7 A6 A3 (3 bytes).

Lookup U+79A3 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0079A3

RGB(0, 121, 163)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.121.163.

Address: 0.0.121.163
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.121.163

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

Position in π

The digit sequence 31139 first appears in π at position 15,014 of the decimal expansion (the 15,014ordinal-suffix:th 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 31139 on Pi Search ↗