426409931 has 2 divisors, whose sum is σ = 426409932. Its totient is φ = 426409930.

The previous prime is 426409901. The next prime is 426409937. The reversal of 426409931 is 139904624.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426409931 is a prime.

It is a super-2 number, since 2×426409931² = 363650858510849522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (426409937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213204965 + 213204966.

It is an arithmetic number, because the mean of its divisors is an integer number (213204966).

Almost surely, 2^426409931 is an apocalyptic number.

426409931 is a deficient number, since it is larger than the sum of its proper divisors (1).

426409931 is an equidigital number, since it uses as much as digits as its factorization.

426409931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 426409931 is about 20649.6956636169. The cubic root of 426409931 is about 752.6777943631.

The spelling of 426409931 in words is "four hundred twenty-six million, four hundred nine thousand, nine hundred thirty-one".