397907023 has 2 divisors, whose sum is σ = 397907024. Its totient is φ = 397907022.

The previous prime is 397907017. The next prime is 397907039. The reversal of 397907023 is 320709793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397907023 - 2²¹ = 395809871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397905023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198953511 + 198953512.

It is an arithmetic number, because the mean of its divisors is an integer number (198953512).

Almost surely, 2^397907023 is an apocalyptic number.

397907023 is a deficient number, since it is larger than the sum of its proper divisors (1).

397907023 is an equidigital number, since it uses as much as digits as its factorization.

397907023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 397907023 is about 19947.6069492057. The cubic root of 397907023 is about 735.5189529221.

The spelling of 397907023 in words is "three hundred ninety-seven million, nine hundred seven thousand, twenty-three".