991,472
991,472 is a composite number, even.
991,472 (nine hundred ninety-one thousand four hundred seventy-two) is an even 6-digit number. It is a composite number with 10 divisors, and factors as 2⁴ × 61,967. Written other ways, in hexadecimal, 0xF20F0.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 32
- Digit product
- 4,536
- Digital root
- 5
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 274,199
- Square (n²)
- 983,016,726,784
- Cube (n³)
- 974,633,560,137,986,048
- Divisor count
- 10
- σ(n) — sum of divisors
- 1,921,008
- φ(n) — Euler's totient
- 495,728
- Sum of prime factors
- 61,975
Primality
Prime factorization: 2 4 × 61967
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√991,472 = [995; (1, 2, 1, 1, 1, 19, 1, 8, 2, 3, 1, 4, 1, 1, 41, 1, 4, 1, 2, 7, 2, 1, 1, 8, …)]
Representations
- In words
- nine hundred ninety-one thousand four hundred seventy-two
- Ordinal
- 991472nd
- Binary
- 11110010000011110000
- Octal
- 3620360
- Hexadecimal
- 0xF20F0
- Base64
- DyDw
- One's complement
- 4,293,975,823 (32-bit)
- Scientific notation
- 9.91472 × 10⁵
- As a duration
- 991,472 s = 11 days, 11 hours, 24 minutes, 32 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ϡϟαυοβʹ
- Chinese
- 九十九萬一千四百七十二
- Chinese (financial)
- 玖拾玖萬壹仟肆佰柒拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 991472, here are decompositions:
- 19 + 991453 = 991472
- 43 + 991429 = 991472
- 199 + 991273 = 991472
- 211 + 991261 = 991472
- 271 + 991201 = 991472
- 409 + 991063 = 991472
- 463 + 991009 = 991472
- 499 + 990973 = 991472
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.15.32.240.
- Address
- 0.15.32.240
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.32.240
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 991,472 and was likely granted around 1911.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 991472 first appears in π at position 963,761 of the decimal expansion (the 963,761ordinal-suffix:st 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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.