101,987
101,987 is a prime, odd.
101,987 (one hundred one thousand nine hundred eighty-seven) is an odd 6-digit number. It is a prime number — divisible only by 1 and itself. Written other ways, in hexadecimal, 0x18E63.
Interestingness
Properties
- Parity
- Odd
- Digit count
- 6
- Digit sum
- 26
- Digit product
- 0
- Digital root
- 8
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 789,101
- Square (n²)
- 10,401,348,169
- Cube (n³)
- 1,060,802,295,711,803
- Divisor count
- 2
- σ(n) — sum of divisors
- 101,988
- φ(n) — Euler's totient
- 101,986
Primality
101,987 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√101,987 = [319; (2, 1, 4, 1, 2, 2, 1, 21, 3, 9, 1, 36, 1, 2, 90, 1, 9, 1, 5, 8, 1, 1, 2, 1, …)]
Representations
- In words
- one hundred one thousand nine hundred eighty-seven
- Ordinal
- 101987th
- Binary
- 11000111001100011
- Octal
- 307143
- Hexadecimal
- 0x18E63
- Base64
- AY5j
- One's complement
- 4,294,865,308 (32-bit)
- Scientific notation
- 1.01987 × 10⁵
- As a duration
- 101,987 s = 1 day, 4 hours, 19 minutes, 47 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ραϡπζʹ
- Mayan (base 20)
- 𝋬·𝋮·𝋳·𝋧
- Chinese
- 一十萬一千九百八十七
- Chinese (financial)
- 壹拾萬壹仟玖佰捌拾柒
Also seen as
As an unsigned 32-bit integer, this is the IPv4 address 0.1.142.99.
- Address
- 0.1.142.99
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.142.99
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 101,987 and was likely granted around 1870.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 101987 first appears in π at position 608,606 of the decimal expansion (the 608,606ordinal-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.
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.