400431667 has 2 divisors, whose sum is σ = 400431668. Its totient is φ = 400431666.

The previous prime is 400431607. The next prime is 400431697. The reversal of 400431667 is 766134004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400431667 - 2¹¹ = 400429619 is a prime.

It is not a weakly prime, because it can be changed into another prime (400431607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200215833 + 200215834.

It is an arithmetic number, because the mean of its divisors is an integer number (200215834).

Almost surely, 2^400431667 is an apocalyptic number.

400431667 is a deficient number, since it is larger than the sum of its proper divisors (1).

400431667 is an equidigital number, since it uses as much as digits as its factorization.

400431667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 400431667 is about 20010.7887650637. The cubic root of 400431667 is about 737.0712502464.

The spelling of 400431667 in words is "four hundred million, four hundred thirty-one thousand, six hundred sixty-seven".