400918933 has 2 divisors, whose sum is σ = 400918934. Its totient is φ = 400918932.

The previous prime is 400918909. The next prime is 400918937. The reversal of 400918933 is 339819004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 391327524 + 9591409 = 19782^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 400918933 - 2¹⁷ = 400787861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400918892 and 400918901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400918937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200459466 + 200459467.

It is an arithmetic number, because the mean of its divisors is an integer number (200459467).

Almost surely, 2^400918933 is an apocalyptic number.

It is an amenable number.

400918933 is a deficient number, since it is larger than the sum of its proper divisors (1).

400918933 is an equidigital number, since it uses as much as digits as its factorization.

400918933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 400918933 is about 20022.9601457926. The cubic root of 400918933 is about 737.3700978905.

The spelling of 400918933 in words is "four hundred million, nine hundred eighteen thousand, nine hundred thirty-three".