390368731 has 2 divisors, whose sum is σ = 390368732. Its totient is φ = 390368730.

The previous prime is 390368717. The next prime is 390368747. The reversal of 390368731 is 137863093.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 390368731 - 2²⁵ = 356814299 is a prime.

It is a super-2 number, since 2×390368731² = 304775492285100722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (390368431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195184365 + 195184366.

It is an arithmetic number, because the mean of its divisors is an integer number (195184366).

Almost surely, 2^390368731 is an apocalyptic number.

390368731 is a deficient number, since it is larger than the sum of its proper divisors (1).

390368731 is an equidigital number, since it uses as much as digits as its factorization.

390368731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 390368731 is about 19757.7511625185. The cubic root of 390368731 is about 730.8445414272.

The spelling of 390368731 in words is "three hundred ninety million, three hundred sixty-eight thousand, seven hundred thirty-one".