478631 has 2 divisors, whose sum is σ = 478632. Its totient is φ = 478630.

The previous prime is 478627. The next prime is 478637. The reversal of 478631 is 136874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 478631 - 2² = 478627 is a prime.

It is a super-2 number, since 2×478631² = 458175268322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 478594 and 478603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239315 + 239316.

It is an arithmetic number, because the mean of its divisors is an integer number (239316).

2⁴⁷⁸⁶³¹ is an apocalyptic number.

478631 is a deficient number, since it is larger than the sum of its proper divisors (1).

478631 is an equidigital number, since it uses as much as digits as its factorization.

478631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 478631 is about 691.8316269151. The cubic root of 478631 is about 78.2228450860. Note that the first 3 decimals are identical.

The spelling of 478631 in words is "four hundred seventy-eight thousand, six hundred thirty-one".