129,980
129,980 is a composite number, even.
129,980 (one hundred twenty-nine thousand nine hundred eighty) is an even 6-digit number. It is a composite number with 24 divisors, and factors as 2² × 5 × 67 × 97. Its proper divisors sum to 149,908, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1FBBC.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 29
- Digit product
- 0
- Digital root
- 2
- Palindrome
- No
- Bit width
- 17 bits
- Reversed
- 89,921
- Recamán's sequence
- a(33,716) = 129,980
- Square (n²)
- 16,894,800,400
- Cube (n³)
- 2,195,986,155,992,000
- Divisor count
- 24
- σ(n) — sum of divisors
- 279,888
- φ(n) — Euler's totient
- 50,688
- Sum of prime factors
- 173
Primality
Prime factorization: 2 2 × 5 × 67 × 97
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√129,980 = [360; (1, 1, 8, 1, 1, 1, 2, 7, 1, 2, 1, 1, 1, 3, 22, 1, 64, 1, 1, 2, 5, 1, 1, 1, …)]
Representations
- In words
- one hundred twenty-nine thousand nine hundred eighty
- Ordinal
- 129980th
- Binary
- 11111101110111100
- Octal
- 375674
- Hexadecimal
- 0x1FBBC
- Base64
- Afu8
- One's complement
- 4,294,837,315 (32-bit)
- Scientific notation
- 1.2998 × 10⁵
- As a duration
- 129,980 s = 1 day, 12 hours, 6 minutes, 20 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ρκθϡπʹ
- Mayan (base 20)
- 𝋰·𝋤·𝋳·𝋠
- Chinese
- 一十二萬九千九百八十
- Chinese (financial)
- 壹拾貳萬玖仟玖佰捌拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 129980, here are decompositions:
- 13 + 129967 = 129980
- 43 + 129937 = 129980
- 61 + 129919 = 129980
- 79 + 129901 = 129980
- 127 + 129853 = 129980
- 139 + 129841 = 129980
- 211 + 129769 = 129980
- 223 + 129757 = 129980
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 9F AE BC (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.1.251.188.
- Address
- 0.1.251.188
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.1.251.188
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 129,980 and was likely granted around 1872.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.