427563931 has 2 divisors, whose sum is σ = 427563932. Its totient is φ = 427563930.

The previous prime is 427563919. The next prime is 427563937. The reversal of 427563931 is 139365724.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 427563931 - 2⁷ = 427563803 is a prime.

It is a super-2 number, since 2×427563931² = 365621830184345522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (427563937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213781965 + 213781966.

It is an arithmetic number, because the mean of its divisors is an integer number (213781966).

Almost surely, 2^427563931 is an apocalyptic number.

427563931 is a deficient number, since it is larger than the sum of its proper divisors (1).

427563931 is an equidigital number, since it uses as much as digits as its factorization.

427563931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 427563931 is about 20677.6190844110. The cubic root of 427563931 is about 753.3561773992.

The spelling of 427563931 in words is "four hundred twenty-seven million, five hundred sixty-three thousand, nine hundred thirty-one".