409255309 has 2 divisors, whose sum is σ = 409255310. Its totient is φ = 409255308.

The previous prime is 409255303. The next prime is 409255391. The reversal of 409255309 is 903552904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294294025 + 114961284 = 17155^2 + 10722^2 .

It is a cyclic number.

It is not a de Polignac number, because 409255309 - 2⁷ = 409255181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409255303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204627654 + 204627655.

It is an arithmetic number, because the mean of its divisors is an integer number (204627655).

Almost surely, 2^409255309 is an apocalyptic number.

It is an amenable number.

409255309 is a deficient number, since it is larger than the sum of its proper divisors (1).

409255309 is an equidigital number, since it uses as much as digits as its factorization.

409255309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 409255309 is about 20230.0595401991. The cubic root of 409255309 is about 742.4458327923.

The spelling of 409255309 in words is "four hundred nine million, two hundred fifty-five thousand, three hundred nine".