399102111 has 24 divisors (see below), whose sum is σ = 584648064. Its totient is φ = 262326480.

The previous prime is 399102079. The next prime is 399102113. The reversal of 399102111 is 111201993.

It is not a de Polignac number, because 399102111 - 2⁵ = 399102079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399102113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195880 + ... + 197906.

It is an arithmetic number, because the mean of its divisors is an integer number (24360336).

Almost surely, 2^399102111 is an apocalyptic number.

399102111 is a deficient number, since it is larger than the sum of its proper divisors (185545953).

399102111 is a wasteful number, since it uses less digits than its factorization.

399102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331 (or 2328 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 399102111 is about 19977.5401638941. The cubic root of 399102111 is about 736.2545781416.

The spelling of 399102111 in words is "three hundred ninety-nine million, one hundred two thousand, one hundred eleven".