399457959023 has 2 divisors, whose sum is σ = 399457959024. Its totient is φ = 399457959022.

The previous prime is 399457958993. The next prime is 399457959029. The reversal of 399457959023 is 320959754993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399457959023 - 2⁶ = 399457958959 is a prime.

It is a super-2 number, since 2×399457959023² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399457959029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199728979511 + 199728979512.

It is an arithmetic number, because the mean of its divisors is an integer number (199728979512).

Almost surely, 2^399457959023 is an apocalyptic number.

399457959023 is a deficient number, since it is larger than the sum of its proper divisors (1).

399457959023 is an equidigital number, since it uses as much as digits as its factorization.

399457959023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82668600, while the sum is 65.

The spelling of 399457959023 in words is "three hundred ninety-nine billion, four hundred fifty-seven million, nine hundred fifty-nine thousand, twenty-three".