129,008
129,008 is a composite number, even.
129,008 (one hundred twenty-nine thousand eight) is an even 6-digit number. It is a composite number with 20 divisors, and factors as 2⁴ × 11 × 733. Its proper divisors sum to 144,040, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1F7F0.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 20
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 800,921
- Recamán's sequence
- a(231,624) = 129,008
- Square (n²)
- 16,643,064,064
- Cube (n³)
- 2,147,088,408,768,512
- Divisor count
- 20
- σ(n) — sum of divisors
- 273,048
- φ(n) — Euler's totient
- 58,560
- Sum of prime factors
- 752
Primality
Prime factorization: 2 4 × 11 × 733
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,008 = [359; (5, 1, 1, 1, 8, 1, 4, 7, 1, 6, 1, 1, 8, 1, 1, 3, 1, 2, 1, 1, 1, 1, 3, 1, …)]
Period length 56 — the block in parentheses repeats forever.
Representations
- In words
- one hundred twenty-nine thousand eight
- Ordinal
- 129008th
- Binary
- 11111011111110000
- Octal
- 373760
- Hexadecimal
- 0x1F7F0
- Base64
- Affw
- One's complement
- 4,294,838,287 (32-bit)
- Scientific notation
- 1.29008 × 10⁵
- As a duration
- 129,008 s = 1 day, 11 hours, 50 minutes, 8 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒌋 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ρκθηʹ
- Mayan (base 20)
- 𝋰·𝋢·𝋪·𝋨
- Chinese
- 一十二萬九千零八
- Chinese (financial)
- 壹拾貳萬玖仟零捌
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 129008, here are decompositions:
- 7 + 129001 = 129008
- 37 + 128971 = 129008
- 67 + 128941 = 129008
- 151 + 128857 = 129008
- 241 + 128767 = 129008
- 331 + 128677 = 129008
- 349 + 128659 = 129008
- 379 + 128629 = 129008
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F 9F B0 (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.247.240.
- Address
- 0.1.247.240
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.247.240
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 129,008 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 129008 first appears in π at position 396,733 of the decimal expansion (the 396,733ordinal-suffix:rd 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.