390338492977 has 2 divisors, whose sum is σ = 390338492978. Its totient is φ = 390338492976.

The previous prime is 390338492969. The next prime is 390338493049. The reversal of 390338492977 is 779294833093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331869318561 + 58469174416 = 576081^2 + 241804^2 .

It is a cyclic number.

It is not a de Polignac number, because 390338492977 - 2³ = 390338492969 is a prime.

It is not a weakly prime, because it can be changed into another prime (390338432977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195169246488 + 195169246489.

It is an arithmetic number, because the mean of its divisors is an integer number (195169246489).

Almost surely, 2^390338492977 is an apocalyptic number.

It is an amenable number.

390338492977 is a deficient number, since it is larger than the sum of its proper divisors (1).

390338492977 is an equidigital number, since it uses as much as digits as its factorization.

390338492977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61725888, while the sum is 64.

The spelling of 390338492977 in words is "three hundred ninety billion, three hundred thirty-eight million, four hundred ninety-two thousand, nine hundred seventy-seven".