405297631 has 2 divisors, whose sum is σ = 405297632. Its totient is φ = 405297630.

The previous prime is 405297623. The next prime is 405297647. The reversal of 405297631 is 136792504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405297631 - 2³ = 405297623 is a prime.

It is a super-2 number, since 2×405297631² = 328532339388424322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405297671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202648815 + 202648816.

It is an arithmetic number, because the mean of its divisors is an integer number (202648816).

Almost surely, 2^405297631 is an apocalyptic number.

405297631 is a deficient number, since it is larger than the sum of its proper divisors (1).

405297631 is an equidigital number, since it uses as much as digits as its factorization.

405297631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 405297631 is about 20132.0051410683. The cubic root of 405297631 is about 740.0448177141.

The spelling of 405297631 in words is "four hundred five million, two hundred ninety-seven thousand, six hundred thirty-one".