199917708 has 12 divisors (see below), whose sum is σ = 466474680. Its totient is φ = 66639232.

The previous prime is 199917691. The next prime is 199917713. The reversal of 199917708 is 807719991.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8329893 + ... + 8329916.

It is an arithmetic number, because the mean of its divisors is an integer number (38872890).

Almost surely, 2^199917708 is an apocalyptic number.

It is an amenable number.

199917708 is an abundant number, since it is smaller than the sum of its proper divisors (266556972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199917708 is a wasteful number, since it uses less digits than its factorization.

199917708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16659816 (or 16659814 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 51.

The square root of 199917708 is about 14139.2258628257. The cubic root of 199917708 is about 584.7233288834.

The spelling of 199917708 in words is "one hundred ninety-nine million, nine hundred seventeen thousand, seven hundred eight".