390336931 has 4 divisors (see below), whose sum is σ = 410881000. Its totient is φ = 369792864.

The previous prime is 390336911. The next prime is 390336941. The reversal of 390336931 is 139633093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139633093 = 3583 ⋅38971.

It is a cyclic number.

It is not a de Polignac number, because 390336931 - 2⁵ = 390336899 is a prime.

It is a super-2 number, since 2×390336931² = 304725839404997522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390336911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10272006 + ... + 10272043.

It is an arithmetic number, because the mean of its divisors is an integer number (102720250).

Almost surely, 2^390336931 is an apocalyptic number.

390336931 is a deficient number, since it is larger than the sum of its proper divisors (20544069).

390336931 is a wasteful number, since it uses less digits than its factorization.

390336931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20544068.

The product of its (nonzero) digits is 39366, while the sum is 37.

The square root of 390336931 is about 19756.9463986720. The cubic root of 390336931 is about 730.8246956714.

The spelling of 390336931 in words is "three hundred ninety million, three hundred thirty-six thousand, nine hundred thirty-one".