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199 (number)
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199 46th
199 (one hundred [and] ninety-nine) is the natural number following 198 and preceding 200.
In mathematics
It is a prime number and the fourth part of a prime quadruplet: 191, 193, 197, 199.A136162 List of prime quadruplets
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.A006050 Smallest number of additive persistence n
If the digits are rearranged, it will still be prime. 199, 919, 991.Strachan Liz https://www.google.com/books/edition/Numbers_Are_Forever/vEvBBAAAQBAJ?hl=en&gbpv=1&dq=Nice+friedman+numbers&pg=PA107&printsec=frontcover Numbers Are Forever 2014-03-20 Little, Brown Book Group 978-1-4721-1110-4 en
See also
199
References
1
Category:Integers
Category: Prime numbers