404113309 has 2 divisors, whose sum is σ = 404113310. Its totient is φ = 404113308.

The previous prime is 404113291. The next prime is 404113351. The reversal of 404113309 is 903311404.

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., 390260025 + 13853284 = 19755^2 + 3722^2 .

It is a cyclic number.

It is not a de Polignac number, because 404113309 - 2²³ = 395724701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404117309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202056654 + 202056655.

It is an arithmetic number, because the mean of its divisors is an integer number (202056655).

Almost surely, 2^404113309 is an apocalyptic number.

It is an amenable number.

404113309 is a deficient number, since it is larger than the sum of its proper divisors (1).

404113309 is an equidigital number, since it uses as much as digits as its factorization.

404113309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 404113309 is about 20102.5697113578. The cubic root of 404113309 is about 739.3232850476.

The spelling of 404113309 in words is "four hundred four million, one hundred thirteen thousand, three hundred nine".