Number

38,921

38,921 is a prime, odd.

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

Properties

Parity: Odd
Digit count: 5
Digit sum: 23
Digit product: 432
Digital root: 5
Palindrome: No
Bit width: 16 bits
Reversed: 12,983
Recamán's sequence: a(305,614) = 38,921
Square (n²): 1,514,844,241
Cube (n³): 58,959,252,703,961
Divisor count: 2
σ(n) — sum of divisors: 38,922
φ(n) — Euler's totient: 38,920

Primality

38,921 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 38921

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 38,921)

1 × 38921

First multiples

38,921 · 77,842 (double) · 116,763 · 155,684 · 194,605 · 233,526 · 272,447 · 311,368 · 350,289 · 389,210

Sums & aliquot sequence

As a sum of two squares: 139² + 140²

As consecutive integers: 19,460 + 19,461

Representations

In words: thirty-eight thousand nine hundred twenty-one
Ordinal: 38921st
Binary: 1001100000001001
Octal: 114011
Hexadecimal: 0x9809
Base64: mAk=
One's complement: 26,614 (16-bit)

In other bases

ternary (3) 1222101112

quaternary (4) 21200021

quinary (5) 2221141

senary (6) 500105

septenary (7) 221321

nonary (9) 58345

undecimal (11) 27273

duodecimal (12) 1a635

tridecimal (13) 1493c

tetradecimal (14) 10281

pentadecimal (15) b7eb

Historical numeral systems

Babylonian (base 60): 𒌋 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓏺
Greek (Milesian): ͵ληϡκαʹ
Mayan (base 20): 𝋤·𝋱·𝋦·𝋡
Chinese: 三萬八千九百二十一
Chinese (financial): 參萬捌仟玖佰貳拾壹

In other modern scripts

Eastern Arabic ٣٨٩٢١ Devanagari ३८९२१ Bengali ৩৮৯২১ Tamil ௩௮௯௨௧ Thai ๓๘๙๒๑ Tibetan ༣༨༩༢༡ Khmer ៣៨៩២១ Lao ໓໘໙໒໑ Burmese ၃၈၉၂၁

Digit at this position in famous constants

π — Pi (π): Digit 38,921 = 4
e — Euler's number (e): Digit 38,921 = 1
φ — Golden ratio (φ): Digit 38,921 = 2
√2 — Pythagoras's (√2): Digit 38,921 = 6
ln 2 — Natural log of 2: Digit 38,921 = 7
γ — Euler-Mascheroni (γ): Digit 38,921 = 1

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 38,917 (gap of 4)
Next prime: 38,923 (gap of 2)

Pair status: twin with 38923, cousin with 38917.

Unicode codepoint

頉

CJK Unified Ideograph-9809

U+9809

Other letter (Lo)

UTF-8 encoding: E9 A0 89 (3 bytes).

Lookup U+9809 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#009809

RGB(0, 152, 9)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.152.9.

Address: 0.0.152.9
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.152.9

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

Position in π

The digit sequence 38921 first appears in π at position 64,996 of the decimal expansion (the 64,996ordinal-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 38921 on Pi Search ↗