404372393 has 2 divisors, whose sum is σ = 404372394. Its totient is φ = 404372392.

The previous prime is 404372377. The next prime is 404372411. The reversal of 404372393 is 393273404.

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., 403688464 + 683929 = 20092^2 + 827^2 .

It is a cyclic number.

It is not a de Polignac number, because 404372393 - 2⁴ = 404372377 is a prime.

It is not a weakly prime, because it can be changed into another prime (404372363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202186196 + 202186197.

It is an arithmetic number, because the mean of its divisors is an integer number (202186197).

Almost surely, 2^404372393 is an apocalyptic number.

It is an amenable number.

404372393 is a deficient number, since it is larger than the sum of its proper divisors (1).

404372393 is an equidigital number, since it uses as much as digits as its factorization.

404372393 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 35.

The square root of 404372393 is about 20109.0127306141. The cubic root of 404372393 is about 739.4812489236.

The spelling of 404372393 in words is "four hundred four million, three hundred seventy-two thousand, three hundred ninety-three".