Number

55,987

55,987 is a prime, odd.

55,987 (fifty-five 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, 0xDAB3.

Arithmetic Number Cube-Free Deficient Number Evil Number Prime Recamán's Sequence Squarefree

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

55,975 55,976 55,977 55,978 55,979 55,980 55,981 55,982 55,983 55,984 55,985 55,986 55,987 55,988 55,989 55,990 55,991 55,992 55,993 55,994 55,995 55,996 55,997 55,998 55,999

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Properties

Parity: Odd
Digit count: 5
Digit sum: 34
Digit product: 12,600
Digital root: 7
Palindrome: No
Bit width: 16 bits
Reversed: 78,955
Recamán's sequence: a(291,846) = 55,987
Square (n²): 3,134,544,169
Cube (n³): 175,493,724,389,803
Divisor count: 2
σ(n) — sum of divisors: 55,988
φ(n) — Euler's totient: 55,986

Primality

55,987 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 55987

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 55,987)

1 × 55987

First multiples

55,987 · 111,974 (double) · 167,961 · 223,948 · 279,935 · 335,922 · 391,909 · 447,896 · 503,883 · 559,870

Sums & aliquot sequence

As consecutive integers: 27,993 + 27,994

Continued fraction of √n

√55,987 = [236; (1, 1, 1, 1, 1, 1, 16, 1, 10, 3, 11, 1, 4, 3, 1, 1, 4, 3, 1, 4, 1, 2, 1, 5, …)]

Representations

In words: fifty-five thousand nine hundred eighty-seven
Ordinal: 55987th
Binary: 1101101010110011
Octal: 155263
Hexadecimal: 0xDAB3
Base64: 2rM=
One's complement: 9,548 (16-bit)
Scientific notation: 5.5987 × 10⁴
As a duration: 55,987 s = 15 hours, 33 minutes, 7 seconds

In other bases

ternary (3) 2211210121

quaternary (4) 31222303

quinary (5) 3242422

senary (6) 1111111

septenary (7) 322141

nonary (9) 84717

undecimal (11) 39078

duodecimal (12) 28497

tridecimal (13) 1c639

tetradecimal (14) 16591

pentadecimal (15) 118c7

Palindromic in base 6

As an angle

55,987° = 155 × 360° + 187°

187° ≈ 3.264 rad

Compass bearing: S (south)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵νεϡπζʹ
Mayan (base 20): 𝋦·𝋳·𝋳·𝋧
Chinese: 五萬五千九百八十七
Chinese (financial): 伍萬伍仟玖佰捌拾柒

In other modern scripts

Eastern Arabic ٥٥٩٨٧ Devanagari ५५९८७ Bengali ৫৫৯৮৭ Tamil ௫௫௯௮௭ Thai ๕๕๙๘๗ Tibetan ༥༥༩༨༧ Khmer ៥៥៩៨៧ Lao ໕໕໙໘໗ Burmese ၅၅၉၈၇

Digit at this position in famous constants

π — Pi (π): Digit 55,987 = 6
e — Euler's number (e): Digit 55,987 = 0
φ — Golden ratio (φ): Digit 55,987 = 0
√2 — Pythagoras's (√2): Digit 55,987 = 2
ln 2 — Natural log of 2: Digit 55,987 = 5
γ — Euler-Mascheroni (γ): Digit 55,987 = 0

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 55,967 (gap of 20)
Next prime: 55,997 (gap of 10)

Hex color

#00DAB3

RGB(0, 218, 179)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.218.179.

Address: 0.0.218.179
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.218.179

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

Position in π

The digit sequence 55987 first appears in π at position 14,014 of the decimal expansion (the 14,014ordinal-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 55987 on Pi Search ↗