401400949 has 2 divisors, whose sum is σ = 401400950. Its totient is φ = 401400948.

The previous prime is 401400943. The next prime is 401401019. The reversal of 401400949 is 949004104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400720324 + 680625 = 20018^2 + 825^2 .

It is a cyclic number.

It is not a de Polignac number, because 401400949 - 2³ = 401400941 is a prime.

It is a super-2 number, since 2×401400949² = 322245443716201202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401400949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401400941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200700474 + 200700475.

It is an arithmetic number, because the mean of its divisors is an integer number (200700475).

Almost surely, 2^401400949 is an apocalyptic number.

It is an amenable number.

401400949 is a deficient number, since it is larger than the sum of its proper divisors (1).

401400949 is an equidigital number, since it uses as much as digits as its factorization.

401400949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 401400949 is about 20034.9931120527. The cubic root of 401400949 is about 737.6654874829.

The spelling of 401400949 in words is "four hundred one million, four hundred thousand, nine hundred forty-nine".