409305161 has 2 divisors, whose sum is σ = 409305162. Its totient is φ = 409305160.

The previous prime is 409305151. The next prime is 409305179. The reversal of 409305161 is 161503904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269616400 + 139688761 = 16420^2 + 11819^2 .

It is a cyclic number.

It is not a de Polignac number, because 409305161 - 2²⁶ = 342196297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (409305151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204652580 + 204652581.

It is an arithmetic number, because the mean of its divisors is an integer number (204652581).

Almost surely, 2^409305161 is an apocalyptic number.

It is an amenable number.

409305161 is a deficient number, since it is larger than the sum of its proper divisors (1).

409305161 is an equidigital number, since it uses as much as digits as its factorization.

409305161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 409305161 is about 20231.2916295525. The cubic root of 409305161 is about 742.4759777133.

The spelling of 409305161 in words is "four hundred nine million, three hundred five thousand, one hundred sixty-one".