409407169 has 2 divisors, whose sum is σ = 409407170. Its totient is φ = 409407168.

The previous prime is 409407157. The next prime is 409407197. The reversal of 409407169 is 961704904.

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., 240095025 + 169312144 = 15495^2 + 13012^2 .

It is a cyclic number.

It is not a de Polignac number, because 409407169 - 2⁵ = 409407137 is a prime.

It is a super-2 number, since 2×409407169² = 335228460057189122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (409407149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204703584 + 204703585.

It is an arithmetic number, because the mean of its divisors is an integer number (204703585).

Almost surely, 2^409407169 is an apocalyptic number.

It is an amenable number.

409407169 is a deficient number, since it is larger than the sum of its proper divisors (1).

409407169 is an equidigital number, since it uses as much as digits as its factorization.

409407169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 409407169 is about 20233.8125176646. The cubic root of 409407169 is about 742.5376531295.

The spelling of 409407169 in words is "four hundred nine million, four hundred seven thousand, one hundred sixty-nine".