Number

3,881

3,881 is a prime, odd.

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

Properties

Parity: Odd
Digit count: 4
Digit sum: 20
Digit product: 192
Digital root: 2
Palindrome: No
Bit width: 12 bits
Reversed: 1,883
Recamán's sequence: a(6,166) = 3,881
Square (n²): 15,062,161
Cube (n³): 58,456,246,841
Divisor count: 2
σ(n) — sum of divisors: 3,882
φ(n) — Euler's totient: 3,880

Primality

3,881 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 3881

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 3,881)

1 × 3881

First multiples

3,881 · 7,762 (double) · 11,643 · 15,524 · 19,405 · 23,286 · 27,167 · 31,048 · 34,929 · 38,810

Sums & aliquot sequence

As a sum of two squares: 20² + 59²

As consecutive integers: 1,940 + 1,941

Representations

In words: three thousand eight hundred eighty-one
Ordinal: 3881st
Roman numeral: MMMDCCCLXXXI
Binary: 111100101001
Octal: 7451
Hexadecimal: 0xF29
Base64: Dyk=
One's complement: 61,654 (16-bit)

In other bases

ternary (3) 12022202

quaternary (4) 330221

quinary (5) 111011

senary (6) 25545

septenary (7) 14213

nonary (9) 5282

undecimal (11) 2a09

duodecimal (12) 22b5

tridecimal (13) 19c7

tetradecimal (14) 15b3

pentadecimal (15) 123b

Historical numeral systems

Babylonian (base 60): 𒁹 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺
Greek (Milesian): ͵γωπαʹ
Mayan (base 20): 𝋩·𝋮·𝋡
Chinese: 三千八百八十一
Chinese (financial): 參仟捌佰捌拾壹

In other modern scripts

Eastern Arabic ٣٨٨١ Devanagari ३८८१ Bengali ৩৮৮১ Tamil ௩௮௮௧ Thai ๓๘๘๑ Tibetan ༣༨༨༡ Khmer ៣៨៨១ Lao ໓໘໘໑ Burmese ၃၈၈၁

Digit at this position in famous constants

π — Pi (π): Digit 3,881 = 8
e — Euler's number (e): Digit 3,881 = 5
φ — Golden ratio (φ): Digit 3,881 = 5
√2 — Pythagoras's (√2): Digit 3,881 = 0
ln 2 — Natural log of 2: Digit 3,881 = 3
γ — Euler-Mascheroni (γ): Digit 3,881 = 9

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 3,877 (gap of 4)
Next prime: 3,889 (gap of 8)

Pair status: cousin with 3877.

Unicode codepoint

༩

Tibetan Digit Nine

U+0F29

Decimal digit (Nd)

UTF-8 encoding: E0 BC A9 (3 bytes).

Lookup U+0F29 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000F29

RGB(0, 15, 41)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.15.41.

Address: 0.0.15.41
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.15.41

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

Position in π

The digit sequence 3881 first appears in π at position 3,027 of the decimal expansion (the 3,027ordinal-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 3881 on Pi Search ↗