400974589 has 2 divisors, whose sum is σ = 400974590. Its totient is φ = 400974588.

The previous prime is 400974569. The next prime is 400974599. The reversal of 400974589 is 985479004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253764900 + 147209689 = 15930^2 + 12133^2 .

It is a cyclic number.

It is not a de Polignac number, because 400974589 - 2⁵ = 400974557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400974569) 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, 200487294 + 200487295.

It is an arithmetic number, because the mean of its divisors is an integer number (200487295).

Almost surely, 2^400974589 is an apocalyptic number.

It is an amenable number.

400974589 is a deficient number, since it is larger than the sum of its proper divisors (1).

400974589 is an equidigital number, since it uses as much as digits as its factorization.

400974589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 400974589 is about 20024.3499020567. The cubic root of 400974589 is about 737.4042171499.

The spelling of 400974589 in words is "four hundred million, nine hundred seventy-four thousand, five hundred eighty-nine".