Live analysis

2,987

2,987 is a composite number, odd.

This number doesn't have a permanent NumberWiki page yet — what you see below is computed live. Pages get added to the permanent index when they're notable (years, primes, curated, etc.).

2,987 (two thousand nine hundred eighty-seven) is an odd 4-digit number. It is a composite number with 4 divisors, and factors as 29 × 103. Written other ways, in Roman numerals it is MMCMLXXXVII and in binary, 101110101011.

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

Interestingness

★ ★ ★ ☆ ☆

5 notable facts · grade C

2,975 2,976 2,977 2,978 2,979 2,980 2,981 2,982 2,983 2,984 2,985 2,986 2,987 2,988 2,989 2,990 2,991 2,992 2,993 2,994 2,995 2,996 2,997 2,998 2,999

less more

Properties

Parity: Odd
Digit count: 4
Digit sum: 26
Digit product: 1,008
Digital root: 8
Palindrome: No
Bit width: 12 bits
Reversed: 7,892
Recamán's sequence: a(2,037) = 2,987
Square (n²): 8,922,169
Cube (n³): 26,650,518,803
Divisor count: 4
σ(n) — sum of divisors: 3,120
φ(n) — Euler's totient: 2,856
Sum of prime factors: 132

Primality

Prime factorization: 29 × 103

Nearest primes: 2,971 (−16) · 2,999 (+12)

Divisors & multiples

All divisors (4)

1 · 29 · 103 · 2987

Aliquot sum (sum of proper divisors): 133

Factor pairs (a × b = 2,987)

1 × 2987

29 × 103

First multiples

2,987 · 5,974 (double) · 8,961 · 11,948 · 14,935 · 17,922 · 20,909 · 23,896 · 26,883 · 29,870

Sums & aliquot sequence

As consecutive integers: 1,493 + 1,494 89 + 90 + … + 117 23 + 24 + … + 80

Aliquot sequence: 2,987 → 133 → 27 → 13 → 1 → 0 — terminates at zero

Continued fraction of √n

√2,987 = [54; (1, 1, 1, 7, 1, 2, 1, 7, 1, 1, 1, 108)]

Period length 12 — the block in parentheses repeats forever.

Representations

In words: two thousand nine hundred eighty-seven
Ordinal: 2987th
Roman numeral: MMCMLXXXVII
Binary: 101110101011
Octal: 5653
Hexadecimal: 0xBAB
Base64: C6s=
One's complement: 62,548 (16-bit)
Scientific notation: 2.987 × 10³
As a duration: 2,987 s = 49 minutes, 47 seconds

In other bases

ternary (3) 11002122

quaternary (4) 232223

quinary (5) 43422

senary (6) 21455

septenary (7) 11465

nonary (9) 4078

undecimal (11) 2276

duodecimal (12) 188b

tridecimal (13) 148a

tetradecimal (14) 1135

pentadecimal (15) d42

Palindromic in base 16

As an angle

2,987° = 8 × 360° + 107°

107° ≈ 1.868 rad

Compass bearing: ESE (east-southeast)

Why does a circle have 360 degrees? →

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵βϡπζʹ
Mayan (base 20): 𝋧·𝋩·𝋧
Chinese: 二千九百八十七
Chinese (financial): 貳仟玖佰捌拾柒

In other modern scripts

Eastern Arabic ٢٩٨٧ Devanagari २९८७ Bengali ২৯৮৭ Tamil ௨௯௮௭ Thai ๒๙๘๗ Tibetan ༢༩༨༧ Khmer ២៩៨៧ Lao ໒໙໘໗ Burmese ၂၉၈၇

Digit at this position in famous constants

π — Pi (π): Digit 2,987 = 9
e — Euler's number (e): Digit 2,987 = 6
φ — Golden ratio (φ): Digit 2,987 = 4
√2 — Pythagoras's (√2): Digit 2,987 = 9
ln 2 — Natural log of 2: Digit 2,987 = 8
γ — Euler-Mascheroni (γ): Digit 2,987 = 8

Also seen as

Hex color

#000BAB

RGB(0, 11, 171)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.11.171.

Address: 0.0.11.171
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.11.171

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

Musical pitch

Heard as a frequency, 2,987 Hz is closest to:

Concert pitch (A4 = 440 Hz): F♯7 (2960 Hz, +16¢)
Scientific pitch (C4 = 256 Hz): G7 (3068.5 Hz, -47¢ — about midway to F♯7)
Baroque pitch (A4 = 415 Hz): G7 (2957.8 Hz, +17¢)

Position in π

The digit sequence 2987 first appears in π at position 14,782 of the decimal expansion (the 14,782ordinal-suffix:nd 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 2987 on Pi Search ↗