396390923 has 2 divisors, whose sum is σ = 396390924. Its totient is φ = 396390922.

The previous prime is 396390877. The next prime is 396390971. The reversal of 396390923 is 329093693.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 396390923 - 2⁶ = 396390859 is a prime.

It is not a weakly prime, because it can be changed into another prime (396390623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198195461 + 198195462.

It is an arithmetic number, because the mean of its divisors is an integer number (198195462).

Almost surely, 2^396390923 is an apocalyptic number.

396390923 is a deficient number, since it is larger than the sum of its proper divisors (1).

396390923 is an equidigital number, since it uses as much as digits as its factorization.

396390923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 44.

The square root of 396390923 is about 19909.5686291793. The cubic root of 396390923 is about 734.5836091544.

The spelling of 396390923 in words is "three hundred ninety-six million, three hundred ninety thousand, nine hundred twenty-three".