Number

10,987

10,987 is a prime, odd.

10,987 (ten thousand nine hundred eighty-seven) is an odd 5-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x2AEB.

Arithmetic Number Cube-Free Deficient Number Emirp Odious Number Prime Recamán's Sequence Sexy Prime Squarefree

Interestingness

★ ★ ★ ★ ☆

7 notable facts · grade B

10,975 10,976 10,977 10,978 10,979 10,980 10,981 10,982 10,983 10,984 10,985 10,986 10,987 10,988 10,989 10,990 10,991 10,992 10,993 10,994 10,995 10,996 10,997 10,998 10,999

less more

Properties

Parity: Odd
Digit count: 5
Digit sum: 25
Digit product: 0
Digital root: 7
Palindrome: No
Bit width: 14 bits
Reversed: 78,901
Recamán's sequence: a(174,285) = 10,987
Square (n²): 120,714,169
Cube (n³): 1,326,286,574,803
Divisor count: 2
σ(n) — sum of divisors: 10,988
φ(n) — Euler's totient: 10,986

Primality

10,987 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 10987

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 10,987)

1 × 10987

First multiples

10,987 · 21,974 (double) · 32,961 · 43,948 · 54,935 · 65,922 · 76,909 · 87,896 · 98,883 · 109,870

Sums & aliquot sequence

As consecutive integers: 5,493 + 5,494

Continued fraction of √n

√10,987 = [104; (1, 4, 1, 1, 11, 9, 1, 8, 1, 1, 1, 2, 4, 1, 1, 1, 1, 2, 8, 1, 2, 1, 2, 1, …)]

Representations

In words: ten thousand nine hundred eighty-seven
Ordinal: 10987th
Binary: 10101011101011
Octal: 25353
Hexadecimal: 0x2AEB
Base64: Kus=
One's complement: 54,548 (16-bit)
Scientific notation: 1.0987 × 10⁴
As a duration: 10,987 s = 3 hours, 3 minutes, 7 seconds

In other bases

ternary (3) 120001221

quaternary (4) 2223223

quinary (5) 322422

senary (6) 122511

septenary (7) 44014

nonary (9) 16057

undecimal (11) 8289

duodecimal (12) 6437

tridecimal (13) 5002

tetradecimal (14) 400b

pentadecimal (15) 33c7

As an angle

10,987° = 30 × 360° + 187°

187° ≈ 3.264 rad

Compass bearing: S (south)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒁹𒁹𒁹 𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵ιϡπζʹ
Mayan (base 20): 𝋡·𝋧·𝋩·𝋧
Chinese: 一萬零九百八十七
Chinese (financial): 壹萬零玖佰捌拾柒

In other modern scripts

Eastern Arabic ١٠٩٨٧ Devanagari १०९८७ Bengali ১০৯৮৭ Tamil ௧௦௯௮௭ Thai ๑๐๙๘๗ Tibetan ༡༠༩༨༧ Khmer ១០៩៨៧ Lao ໑໐໙໘໗ Burmese ၁၀၉၈၇

Digit at this position in famous constants

π — Pi (π): Digit 10,987 = 4
e — Euler's number (e): Digit 10,987 = 5
φ — Golden ratio (φ): Digit 10,987 = 8
√2 — Pythagoras's (√2): Digit 10,987 = 5
ln 2 — Natural log of 2: Digit 10,987 = 2
γ — Euler-Mascheroni (γ): Digit 10,987 = 3

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 10,979 (gap of 8)
Next prime: 10,993 (gap of 6)

Pair status: sexy with 10993.

Unicode codepoint

⫫

Double Up Tack

U+2AEB

Math symbol (Sm)

UTF-8 encoding: E2 AB AB (3 bytes).

Lookup U+2AEB on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#002AEB

RGB(0, 42, 235)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.42.235.

Address: 0.0.42.235
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.42.235

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

Musical pitch

Heard as a frequency, 10,987 Hz is closest to:

Concert pitch (A4 = 440 Hz): F9 (11175.3 Hz, -29¢)
Scientific pitch (C4 = 256 Hz): F9 (10935 Hz, +8¢)
Baroque pitch (A4 = 415 Hz): F♯9 (11167.1 Hz, -28¢)

Position in π

The digit sequence 10987 first appears in π at position 5,596 of the decimal expansion (the 5,596ordinal-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 10987 on Pi Search ↗