399308959 has 12 divisors (see below), whose sum is σ = 481638864. Its totient is φ = 324248832.

The previous prime is 399308951. The next prime is 399308977. The reversal of 399308959 is 959803993.

It is not a de Polignac number, because 399308959 - 2³ = 399308951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399308951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76482 + ... + 81535.

It is an arithmetic number, because the mean of its divisors is an integer number (40136572).

Almost surely, 2^399308959 is an apocalyptic number.

399308959 is a deficient number, since it is larger than the sum of its proper divisors (82329905).

399308959 is a wasteful number, since it uses less digits than its factorization.

399308959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158062 (or 158043 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 55.

The square root of 399308959 is about 19982.7165070218. The cubic root of 399308959 is about 736.3817523493.

The spelling of 399308959 in words is "three hundred ninety-nine million, three hundred eight thousand, nine hundred fifty-nine".