199999916 has 24 divisors (see below), whose sum is σ = 353263680. Its totient is φ = 99072512.

The previous prime is 199999903. The next prime is 199999931. The reversal of 199999916 is 619999991.

199999916 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

199999916 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277805 + ... + 278523.

It is an arithmetic number, because the mean of its divisors is an integer number (14719320).

Almost surely, 2^199999916 is an apocalyptic number.

It is an amenable number.

199999916 is a deficient number, since it is larger than the sum of its proper divisors (153263764).

199999916 is a wasteful number, since it uses less digits than its factorization.

199999916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273 (or 1271 counting only the distinct ones).

The product of its digits is 3188646, while the sum is 62.

The square root of 199999916 is about 14142.1326538822. The cubic root of 199999916 is about 584.8034657701.

The spelling of 199999916 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixteen".