199399718 has 24 divisors (see below), whose sum is σ = 366247800. Its totient is φ = 80958528.

The previous prime is 199399703. The next prime is 199399757. The reversal of 199399718 is 817993991.

199399718 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51683 + ... + 55406.

It is an arithmetic number, because the mean of its divisors is an integer number (15260325).

Almost surely, 2^199399718 is an apocalyptic number.

199399718 is a deficient number, since it is larger than the sum of its proper divisors (166848082).

199399718 is a wasteful number, since it uses less digits than its factorization.

199399718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107124 (or 107117 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 56.

The square root of 199399718 is about 14120.8965012849. The cubic root of 199399718 is about 584.2178829059.

The spelling of 199399718 in words is "one hundred ninety-nine million, three hundred ninety-nine thousand, seven hundred eighteen".