400354631 has 2 divisors, whose sum is σ = 400354632. Its totient is φ = 400354630.

The previous prime is 400354621. The next prime is 400354637. The reversal of 400354631 is 136453004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400354631 is a prime.

It is a super-2 number, since 2×400354631² = 320567661126292322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400354631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400354637) 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, 200177315 + 200177316.

It is an arithmetic number, because the mean of its divisors is an integer number (200177316).

Almost surely, 2^400354631 is an apocalyptic number.

400354631 is a deficient number, since it is larger than the sum of its proper divisors (1).

400354631 is an equidigital number, since it uses as much as digits as its factorization.

400354631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 400354631 is about 20008.8638108214. The cubic root of 400354631 is about 737.0239807061.

The spelling of 400354631 in words is "four hundred million, three hundred fifty-four thousand, six hundred thirty-one".