199 (one hundred [and] ninety-nine) is the natural number following 198 and preceding 200.
| ||||
|---|---|---|---|---|
| Cardinal | one hundred ninety-nine | |||
| Ordinal | 199th (one hundred ninety-ninth) | |||
| Factorization | prime | |||
| Prime | 46th | |||
| Greek numeral | ΡϞΘ´ | |||
| Roman numeral | CXCIX | |||
| Binary | 110001112 | |||
| Ternary | 211013 | |||
| Senary | 5316 | |||
| Octal | 3078 | |||
| Duodecimal | 14712 | |||
| Hexadecimal | C716 | |||
In mathematics
edit199 is a centered triangular number.[1]
It is a prime number and the fourth part of a prime quadruplet: 191, 193, 197, 199.[2]
199 is the smallest natural number that takes more than two iterations to compute its digital root as a repeated digit sum: Thus, its additive persistence is three, and it is the smallest number of persistence three.[3]
See also
editReferences
edit- ^ Sloane, N. J. A. (ed.). "Sequence A005448 (Centered triangular numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A136162 (List of prime quadruplets)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A006050 (Smallest number of additive persistence n)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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