Number

18,089

18,089 is a prime, odd.

18,089 (eighteen thousand eighty-nine) is an odd 5-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x46A9.

Arithmetic Number Chen Prime Cube-Free Deficient Number Emirp Flippable Odious Number Pernicious Number Prime Pythagorean Prime Recamán's Sequence Squarefree

Interestingness

★ ★ ★ ★ ★

9 notable facts · grade A

18,077 18,078 18,079 18,080 18,081 18,082 18,083 18,084 18,085 18,086 18,087 18,088 18,089 18,090 18,091 18,092 18,093 18,094 18,095 18,096 18,097 18,098 18,099 18,100 18,101

less more

Properties

Parity: Odd
Digit count: 5
Digit sum: 26
Digit product: 0
Digital root: 8
Palindrome: No
Bit width: 15 bits
Reversed: 98,081
Flips to (rotate 180°): 68,081
Recamán's sequence: a(15,878) = 18,089
Square (n²): 327,211,921
Cube (n³): 5,918,936,438,969
Divisor count: 2
σ(n) — sum of divisors: 18,090
φ(n) — Euler's totient: 18,088

Primality

18,089 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 18089

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 18,089)

1 × 18089

First multiples

18,089 · 36,178 (double) · 54,267 · 72,356 · 90,445 · 108,534 · 126,623 · 144,712 · 162,801 · 180,890

Sums & aliquot sequence

As a sum of two squares: 20² + 133²

As consecutive integers: 9,044 + 9,045

Continued fraction of √n

√18,089 = [134; (2, 53, 3, 2, 1, 10, 16, 1, 2, 1, 1, 4, 3, 6, 1, 23, 1, 1, 2, 3, 1, 4, 8, 2, …)]

Representations

In words: eighteen thousand eighty-nine
Ordinal: 18089th
Binary: 100011010101001
Octal: 43251
Hexadecimal: 0x46A9
Base64: Rqk=
One's complement: 47,446 (16-bit)
Scientific notation: 1.8089 × 10⁴
As a duration: 18,089 s = 5 hours, 1 minute, 29 seconds

In other bases

ternary (3) 220210222

quaternary (4) 10122221

quinary (5) 1034324

senary (6) 215425

septenary (7) 103511

nonary (9) 26728

undecimal (11) 12655

duodecimal (12) a575

tridecimal (13) 8306

tetradecimal (14) 6841

pentadecimal (15) 555e

As an angle

18,089° = 50 × 360° + 89°

89° ≈ 1.553 rad

Compass bearing: E (east)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹𒁹𒁹 𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵ιηπθʹ
Mayan (base 20): 𝋢·𝋥·𝋤·𝋩
Chinese: 一萬八千零八十九
Chinese (financial): 壹萬捌仟零捌拾玖

In other modern scripts

Eastern Arabic ١٨٠٨٩ Devanagari १८०८९ Bengali ১৮০৮৯ Tamil ௧௮௦௮௯ Thai ๑๘๐๘๙ Tibetan ༡༨༠༨༩ Khmer ១៨០៨៩ Lao ໑໘໐໘໙ Burmese ၁၈၀၈၉

Digit at this position in famous constants

π — Pi (π): Digit 18,089 = 5
e — Euler's number (e): Digit 18,089 = 8
φ — Golden ratio (φ): Digit 18,089 = 4
√2 — Pythagoras's (√2): Digit 18,089 = 1
ln 2 — Natural log of 2: Digit 18,089 = 3
γ — Euler-Mascheroni (γ): Digit 18,089 = 9

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 18,077 (gap of 12)
Next prime: 18,097 (gap of 8)

Unicode codepoint

䚩

CJK Unified Ideograph-46A9

U+46A9

Other letter (Lo)

UTF-8 encoding: E4 9A A9 (3 bytes).

Lookup U+46A9 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0046A9

RGB(0, 70, 169)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.70.169.

Address: 0.0.70.169
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.70.169

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

Musical pitch

Heard as a frequency, 18,089 Hz is closest to:

Concert pitch (A4 = 440 Hz): C♯10 (17739.7 Hz, +34¢)
Scientific pitch (C4 = 256 Hz): D10 (18390.4 Hz, -29¢)
Baroque pitch (A4 = 415 Hz): D10 (17726.7 Hz, +35¢)

Position in π

The digit sequence 18089 first appears in π at position 44,074 of the decimal expansion (the 44,074ordinal-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 18089 on Pi Search ↗