131,990
131,990 is a composite number, even.
131,990 (one hundred thirty-one thousand nine hundred ninety) is an even 6-digit number. It is a composite number with 16 divisors, and factors as 2 × 5 × 67 × 197. Written other ways, in hexadecimal, 0x20396.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 0
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 99,131
- Recamán's sequence
- a(228,392) = 131,990
- Square (n²)
- 17,421,360,100
- Cube (n³)
- 2,299,445,319,599,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 242,352
- φ(n) — Euler's totient
- 51,744
- Sum of prime factors
- 271
Primality
Prime factorization: 2 × 5 × 67 × 197
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,990 = [363; (3, 3, 2, 27, 1, 1, 20, 1, 6, 4, 6, 2, 2, 1, 4, 1, 2, 2, 6, 4, 6, 1, 20, 1, …)]
Period length 30 — the block in parentheses repeats forever.
Representations
- In words
- one hundred thirty-one thousand nine hundred ninety
- Ordinal
- 131990th
- Binary
- 100000001110010110
- Octal
- 401626
- Hexadecimal
- 0x20396
- Base64
- AgOW
- One's complement
- 4,294,835,305 (32-bit)
- Scientific notation
- 1.3199 × 10⁵
- As a duration
- 131,990 s = 1 day, 12 hours, 39 minutes, 50 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρλαϡϟʹ
- Mayan (base 20)
- 𝋰·𝋩·𝋳·𝋪
- Chinese
- 一十三萬一千九百九十
- Chinese (financial)
- 壹拾參萬壹仟玖佰玖拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131990, here are decompositions:
- 31 + 131959 = 131990
- 43 + 131947 = 131990
- 97 + 131893 = 131990
- 151 + 131839 = 131990
- 193 + 131797 = 131990
- 211 + 131779 = 131990
- 241 + 131749 = 131990
- 277 + 131713 = 131990
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 8E 96 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.3.150.
- Address
- 0.2.3.150
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.3.150
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 131,990 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 131990 first appears in π at position 473,058 of the decimal expansion (the 473,058ordinal-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
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.