399031017 has 24 divisors (see below), whose sum is σ = 668353728. Its totient is φ = 207287520.

The previous prime is 399031007. The next prime is 399031033. The reversal of 399031017 is 710130993.

It is not a de Polignac number, because 399031017 - 2⁷ = 399030889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (399031007) 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, 75978 + ... + 81059.

It is an arithmetic number, because the mean of its divisors is an integer number (27848072).

Almost surely, 2^399031017 is an apocalyptic number.

It is an amenable number.

399031017 is a deficient number, since it is larger than the sum of its proper divisors (269322711).

399031017 is a wasteful number, since it uses less digits than its factorization.

399031017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157069 (or 157058 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 33.

The square root of 399031017 is about 19975.7607364526. The cubic root of 399031017 is about 736.2108580092.

The spelling of 399031017 in words is "three hundred ninety-nine million, thirty-one thousand, seventeen".