400798913 has 2 divisors, whose sum is σ = 400798914. Its totient is φ = 400798912.

The previous prime is 400798889. The next prime is 400798967. The reversal of 400798913 is 319897004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 355209409 + 45589504 = 18847^2 + 6752^2 .

It is a cyclic number.

It is not a de Polignac number, because 400798913 - 2¹⁸ = 400536769 is a prime.

It is not a weakly prime, because it can be changed into another prime (400798513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200399456 + 200399457.

It is an arithmetic number, because the mean of its divisors is an integer number (200399457).

Almost surely, 2^400798913 is an apocalyptic number.

It is an amenable number.

400798913 is a deficient number, since it is larger than the sum of its proper divisors (1).

400798913 is an equidigital number, since it uses as much as digits as its factorization.

400798913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 400798913 is about 20019.9628621034. The cubic root of 400798913 is about 737.2965102859.

The spelling of 400798913 in words is "four hundred million, seven hundred ninety-eight thousand, nine hundred thirteen".