119 (number)
| ||||
|---|---|---|---|---|
| Cardinal | one hundred nineteen | |||
| Ordinal | 119th (one hundred nineteenth) | |||
| Factorization | 7 × 17 | |||
| Divisors | 1, 7, 17, 119 | |||
| Greek numeral | ΡΙΘ´ | |||
| Roman numeral | CXIX, cxix | |||
| Binary | 11101112 | |||
| Ternary | 111023 | |||
| Senary | 3156 | |||
| Octal | 1678 | |||
| Duodecimal | 9B12 | |||
| Hexadecimal | 7716 | |||
119 (one hundred [and] nineteen) is the natural number following 118 and preceding 120.
Mathematics
[edit]- 119 is a Perrin number, preceded in the sequence by 51, 68, 90 (it is the sum of the first two mentioned).[1]
- 119 is the sum of five consecutive primes (17 + 19 + 23 + 29 + 31).
- 119 is the sum of seven consecutive primes (7 + 11 + 13 + 17 + 19 + 23 + 29).
- 119 is a highly cototient number.[2]
- 119 is one of five numbers to hold a sum-of-divisors of 144 = 122 (the others are 66, 70, 94, and 115).[3]
- 119 is the order of the largest cyclic subgroups of the monster group.[4]
- 119 is the smallest composite number that is 1 less than a factorial (120 is 5!).[5]
- 119 is a semiprime, and the fourth in the {7×q} family.[6]
Telephony
[edit]- 119 is an emergency telephone number in some countries
- A number to report youth at risk in France[7]
- 119 is the emergency number in Afghanistan that belongs to police and interior ministry.
- The South Korean emergency call number
- The Chinese fire station call number
- 119 is the number for the UK's NHS Test and Trace service (created in response to the COVID-19 pandemic)
References
[edit]- ^ "Sloane's A001608 : Perrin sequence". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 27 May 2016.
- ^ "Sloane's A100827 : Highly cototient numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 27 May 2016.
- ^ Sloane, N. J. A. (ed.). "Sequence A000203 (Sum of divisors of n.)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 11 July 2024.
- ^ J. H. Conway et al.: Atlas of Finite Groups. Clarendon Press, Oxford, 1985. ISBN 0-19-853199-0 (Page 223)
- ^ Sloane, N. J. A. (ed.). "Sequence A033312 (a(n) = n! - 1)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A001358 (Semiprimes (or biprimes): products of two primes.)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Descriptive website