404422631 has 2 divisors, whose sum is σ = 404422632. Its totient is φ = 404422630.

The previous prime is 404422609. The next prime is 404422633. The reversal of 404422631 is 136224404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404422631 - 2²² = 400228327 is a prime.

It is a super-2 number, since 2×404422631² = 327115328929924322, which contains 22 as substring.

Together with 404422633, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404422631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404422633) 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, 202211315 + 202211316.

It is an arithmetic number, because the mean of its divisors is an integer number (202211316).

Almost surely, 2^404422631 is an apocalyptic number.

404422631 is a deficient number, since it is larger than the sum of its proper divisors (1).

404422631 is an equidigital number, since it uses as much as digits as its factorization.

404422631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 404422631 is about 20110.2618332035. The cubic root of 404422631 is about 739.5118712915.

The spelling of 404422631 in words is "four hundred four million, four hundred twenty-two thousand, six hundred thirty-one".