390491767 has 2 divisors, whose sum is σ = 390491768. Its totient is φ = 390491766.

The previous prime is 390491741. The next prime is 390491791. The reversal of 390491767 is 767194093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 390491767 - 2¹¹ = 390489719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390461767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195245883 + 195245884.

It is an arithmetic number, because the mean of its divisors is an integer number (195245884).

Almost surely, 2^390491767 is an apocalyptic number.

390491767 is a deficient number, since it is larger than the sum of its proper divisors (1).

390491767 is an equidigital number, since it uses as much as digits as its factorization.

390491767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 390491767 is about 19760.8645306829. The cubic root of 390491767 is about 730.9213156294.

The spelling of 390491767 in words is "three hundred ninety million, four hundred ninety-one thousand, seven hundred sixty-seven".