390943432931 has 2 divisors, whose sum is σ = 390943432932. Its totient is φ = 390943432930.

The previous prime is 390943432883. The next prime is 390943432939. The reversal of 390943432931 is 139234349093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 390943432931 - 2³⁸ = 116065525987 is a prime.

It is a super-2 number, since 2×390943432931² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 390943432931.

It is not a weakly prime, because it can be changed into another prime (390943432939) 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 as a sum of consecutive naturals, namely, 195471716465 + 195471716466.

It is an arithmetic number, because the mean of its divisors is an integer number (195471716466).

Almost surely, 2^390943432931 is an apocalyptic number.

390943432931 is a deficient number, since it is larger than the sum of its proper divisors (1).

390943432931 is an equidigital number, since it uses as much as digits as its factorization.

390943432931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1889568, while the sum is 50.

The spelling of 390943432931 in words is "three hundred ninety billion, nine hundred forty-three million, four hundred thirty-two thousand, nine hundred thirty-one".