400974823 has 2 divisors, whose sum is σ = 400974824. Its totient is φ = 400974822.

The previous prime is 400974779. The next prime is 400974901. The reversal of 400974823 is 328479004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400974823 - 2⁹ = 400974311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400974323) 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, 200487411 + 200487412.

It is an arithmetic number, because the mean of its divisors is an integer number (200487412).

Almost surely, 2^400974823 is an apocalyptic number.

400974823 is a deficient number, since it is larger than the sum of its proper divisors (1).

400974823 is an equidigital number, since it uses as much as digits as its factorization.

400974823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 400974823 is about 20024.3557449422. The cubic root of 400974823 is about 737.4043605942.

The spelling of 400974823 in words is "four hundred million, nine hundred seventy-four thousand, eight hundred twenty-three".