478945931 has 2 divisors, whose sum is σ = 478945932. Its totient is φ = 478945930.

The previous prime is 478945921. The next prime is 478945937. The reversal of 478945931 is 139549874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478945931 - 2¹⁴ = 478929547 is a prime.

It is a super-4 number, since 4×478945931⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 478945931.

It is not a weakly prime, because it can be changed into another prime (478945937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239472965 + 239472966.

It is an arithmetic number, because the mean of its divisors is an integer number (239472966).

Almost surely, 2^478945931 is an apocalyptic number.

478945931 is a deficient number, since it is larger than the sum of its proper divisors (1).

478945931 is an equidigital number, since it uses as much as digits as its factorization.

478945931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 478945931 is about 21884.8333555456. The cubic root of 478945931 is about 782.3999775523.

The spelling of 478945931 in words is "four hundred seventy-eight million, nine hundred forty-five thousand, nine hundred thirty-one".