131,398
131,398 is a composite number, even.
131,398 (one hundred thirty-one thousand three hundred ninety-eight) is an even 6-digit number. It is a composite number with 4 divisors, and factors as 2 × 65,699. Written other ways, in hexadecimal, 0x20146.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 25
- Digit product
- 648
- Digital root
- 7
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 893,131
- Recamán's sequence
- a(24,447) = 131,398
- Square (n²)
- 17,265,434,404
- Cube (n³)
- 2,268,643,549,816,792
- Divisor count
- 4
- σ(n) — sum of divisors
- 197,100
- φ(n) — Euler's totient
- 65,698
- Sum of prime factors
- 65,701
Primality
Prime factorization: 2 × 65699
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√131,398 = [362; (2, 21, 2, 7, 1, 1, 1, 11, 24, 1, 10, 1, 1, 4, 1, 3, 2, 1, 7, 9, 1, 4, 32, 1, …)]
Representations
- In words
- one hundred thirty-one thousand three hundred ninety-eight
- Ordinal
- 131398th
- Binary
- 100000000101000110
- Octal
- 400506
- Hexadecimal
- 0x20146
- Base64
- AgFG
- One's complement
- 4,294,835,897 (32-bit)
- Scientific notation
- 1.31398 × 10⁵
- As a duration
- 131,398 s = 1 day, 12 hours, 29 minutes, 58 seconds
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρλατϟηʹ
- Mayan (base 20)
- 𝋰·𝋨·𝋩·𝋲
- Chinese
- 一十三萬一千三百九十八
- Chinese (financial)
- 壹拾參萬壹仟參佰玖拾捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 131398, here are decompositions:
- 17 + 131381 = 131398
- 41 + 131357 = 131398
- 101 + 131297 = 131398
- 131 + 131267 = 131398
- 149 + 131249 = 131398
- 167 + 131231 = 131398
- 227 + 131171 = 131398
- 269 + 131129 = 131398
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A0 85 86 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.1.70.
- Address
- 0.2.1.70
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.1.70
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 131,398 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 131398 first appears in π at position 531,511 of the decimal expansion (the 531,511ordinal-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
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.