199 (number)
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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 |
199 (one hundred [and] ninety-nine) is the natural number following 198 and preceding 200.
In mathematics
[edit]199 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
[edit]References
[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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