199 (number)
From HandWiki
Short description: Natural number
| ||||
|---|---|---|---|---|
| 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 | |||
| Quaternary | 30134 | |||
| Quinary | 12445 | |||
| Senary | 5316 | |||
| Octal | 3078 | |||
| Duodecimal | 14712 | |||
| Hexadecimal | C716 | |||
| Vigesimal | 9J20 | |||
| Base 36 | 5J36 | |||
199 (one hundred [and] ninety-nine) is the natural number following 198 and preceding 200.
In mathematics
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: [math]\displaystyle{ \begin{align} 199&\mapsto 1+9+9=19\\ &\mapsto 1+9=10\\ &\mapsto 1+0=1. \end{align} }[/math] Thus, its additive persistence is three, and it is the smallest number of persistence three.[3]
See also
- The year AD 199 or 199 BC
- List of highways numbered 199
- All pages with titles containing 199
References
- ↑ Sloane, N. J. A., ed. "Sequence A005448 (Centered triangular numbers)". OEIS Foundation. https://oeis.org/A005448.
- ↑ Sloane, N. J. A., ed. "Sequence A136162 (List of prime quadruplets)". OEIS Foundation. https://oeis.org/A136162.
- ↑ Sloane, N. J. A., ed. "Sequence A006050 (Smallest number of additive persistence n)". OEIS Foundation. https://oeis.org/A006050.
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