4,987
4,987 is a prime, odd.
4,987 (four thousand nine hundred eighty-seven) is an odd 4-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x137B.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 4
- Digit sum
- 28
- Digit product
- 2,016
- Digital root
- 1
- Palindrome
- No
- Bit width
- 13 bits
- Reversed
- 7,894
- Recamán's sequence
- a(28,154) = 4,987
- Square (n²)
- 24,870,169
- Cube (n³)
- 124,027,532,803
- Divisor count
- 2
- σ(n) — sum of divisors
- 4,988
- φ(n) — Euler's totient
- 4,986
Primality
4,987 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√4,987 = [70; (1, 1, 1, 1, 1, 1, 1, 5, 1, 4, 46, 1, 6, 1, 6, 1, 1, 3, 1, 2, 1, 14, 1, 22, …)]
Representations
- In words
- four thousand nine hundred eighty-seven
- Ordinal
- 4987th
- Binary
- 1001101111011
- Octal
- 11573
- Hexadecimal
- 0x137B
- Base64
- E3s=
- One's complement
- 60,548 (16-bit)
- Scientific notation
- 4.987 × 10³
- As a duration
- 4,987 s = 1 hour, 23 minutes, 7 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹 𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵δϡπζʹ
- Mayan (base 20)
- 𝋬·𝋩·𝋧
- Chinese
- 四千九百八十七
- Chinese (financial)
- 肆仟玖佰捌拾柒
Digit at this position in famous constants
- π — Pi (π)
- Digit 4,987 = 8
- e — Euler's number (e)
- Digit 4,987 = 6
- φ — Golden ratio (φ)
- Digit 4,987 = 4
- √2 — Pythagoras's (√2)
- Digit 4,987 = 1
- ln 2 — Natural log of 2
- Digit 4,987 = 8
- γ — Euler-Mascheroni (γ)
- Digit 4,987 = 0
Also seen as
UTF-8 encoding: E1 8D BB (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.19.123.
- Address
- 0.0.19.123
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.19.123
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 4,987 Hz is closest to:
- Concert pitch (A4 = 440 Hz): D♯8 (4978 Hz, +3¢)
- Scientific pitch (C4 = 256 Hz): D♯8 (4871 Hz, +41¢)
- Baroque pitch (A4 = 415 Hz): E8 (4974.4 Hz, +4¢)
The digit sequence 4987 first appears in π at position 1,509 of the decimal expansion (the 1,509ordinal-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.
Related reading
- Prime numbers — The building blocks of arithmetic: what primes are, why they matter, and how we find them.
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.