400752431 has 2 divisors, whose sum is σ = 400752432. Its totient is φ = 400752430.

The previous prime is 400752413. The next prime is 400752463. The reversal of 400752431 is 134257004.

Together with previous prime (400752413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400752431 - 2¹⁸ = 400490287 is a prime.

It is a super-2 number, since 2×400752431² = 321205021904819522, which contains 22 as substring.

It is a Sophie Germain prime.

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 400752431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400752481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200376215 + 200376216.

It is an arithmetic number, because the mean of its divisors is an integer number (200376216).

Almost surely, 2^400752431 is an apocalyptic number.

400752431 is a deficient number, since it is larger than the sum of its proper divisors (1).

400752431 is an equidigital number, since it uses as much as digits as its factorization.

400752431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 400752431 is about 20018.8019371790. The cubic root of 400752431 is about 737.2680069307.

The spelling of 400752431 in words is "four hundred million, seven hundred fifty-two thousand, four hundred thirty-one".