404253431 has 2 divisors, whose sum is σ = 404253432. Its totient is φ = 404253430.

The previous prime is 404253407. The next prime is 404253461. The reversal of 404253431 is 134352404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404253431 is a prime.

It is a super-2 number, since 2×404253431² = 326841672950543522, which contains 22 as substring.

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 404253431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404253461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202126715 + 202126716.

It is an arithmetic number, because the mean of its divisors is an integer number (202126716).

Almost surely, 2^404253431 is an apocalyptic number.

404253431 is a deficient number, since it is larger than the sum of its proper divisors (1).

404253431 is an equidigital number, since it uses as much as digits as its factorization.

404253431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 404253431 is about 20106.0545856217. The cubic root of 404253431 is about 739.4087260067.

The spelling of 404253431 in words is "four hundred four million, two hundred fifty-three thousand, four hundred thirty-one".