400974641 has 2 divisors, whose sum is σ = 400974642. Its totient is φ = 400974640.

The previous prime is 400974599. The next prime is 400974647. The reversal of 400974641 is 146479004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364008241 + 36966400 = 19079^2 + 6080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400974641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400974647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200487320 + 200487321.

It is an arithmetic number, because the mean of its divisors is an integer number (200487321).

Almost surely, 2^400974641 is an apocalyptic number.

It is an amenable number.

400974641 is a deficient number, since it is larger than the sum of its proper divisors (1).

400974641 is an equidigital number, since it uses as much as digits as its factorization.

400974641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 400974641 is about 20024.3512004759. The cubic root of 400974641 is about 737.4042490264.

The spelling of 400974641 in words is "four hundred million, nine hundred seventy-four thousand, six hundred forty-one".