408423931 has 2 divisors, whose sum is σ = 408423932. Its totient is φ = 408423930.

The previous prime is 408423913. The next prime is 408423941. The reversal of 408423931 is 139324804.

Together with previous prime (408423913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 408423931 - 2¹³ = 408415739 is a prime.

It is a super-2 number, since 2×408423931² = 333620214826985522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (408423941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204211965 + 204211966.

It is an arithmetic number, because the mean of its divisors is an integer number (204211966).

Almost surely, 2^408423931 is an apocalyptic number.

408423931 is a deficient number, since it is larger than the sum of its proper divisors (1).

408423931 is an equidigital number, since it uses as much as digits as its factorization.

408423931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 408423931 is about 20209.5010081892. The cubic root of 408423931 is about 741.9427470155.

The spelling of 408423931 in words is "four hundred eight million, four hundred twenty-three thousand, nine hundred thirty-one".