400977667 has 2 divisors, whose sum is σ = 400977668. Its totient is φ = 400977666.

The previous prime is 400977659. The next prime is 400977679. The reversal of 400977667 is 766779004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400977667 - 2³ = 400977659 is a prime.

It is not a weakly prime, because it can be changed into another prime (400974667) 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, 200488833 + 200488834.

It is an arithmetic number, because the mean of its divisors is an integer number (200488834).

Almost surely, 2^400977667 is an apocalyptic number.

400977667 is a deficient number, since it is larger than the sum of its proper divisors (1).

400977667 is an equidigital number, since it uses as much as digits as its factorization.

400977667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 46.

The square root of 400977667 is about 20024.4267583369. The cubic root of 400977667 is about 737.4061039897.

The spelling of 400977667 in words is "four hundred million, nine hundred seventy-seven thousand, six hundred sixty-seven".