423931 has 2 divisors, whose sum is σ = 423932. Its totient is φ = 423930.

The previous prime is 423887. The next prime is 423949. The reversal of 423931 is 139324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423931 - 2⁷ = 423803 is a prime.

It is a super-2 number, since 2×423931² = 359434985522, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (423961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211965 + 211966.

It is an arithmetic number, because the mean of its divisors is an integer number (211966).

2⁴²³⁹³¹ is an apocalyptic number.

423931 is a deficient number, since it is larger than the sum of its proper divisors (1).

423931 is an equidigital number, since it uses as much as digits as its factorization.

423931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

The square root of 423931 is about 651.0998387344. The cubic root of 423931 is about 75.1216396477.

The spelling of 423931 in words is "four hundred twenty-three thousand, nine hundred thirty-one".