409931069 has 2 divisors, whose sum is σ = 409931070. Its totient is φ = 409931068.

The previous prime is 409931051. The next prime is 409931077. The reversal of 409931069 is 960139904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328696900 + 81234169 = 18130^2 + 9013^2 .

It is a cyclic number.

It is not a de Polignac number, because 409931069 - 2⁸ = 409930813 is a prime.

It is a super-2 number, since 2×409931069² = 336086962662965522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409931089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204965534 + 204965535.

It is an arithmetic number, because the mean of its divisors is an integer number (204965535).

Almost surely, 2^409931069 is an apocalyptic number.

It is an amenable number.

409931069 is a deficient number, since it is larger than the sum of its proper divisors (1).

409931069 is an equidigital number, since it uses as much as digits as its factorization.

409931069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 409931069 is about 20246.7545300475. The cubic root of 409931069 is about 742.8542488388.

The spelling of 409931069 in words is "four hundred nine million, nine hundred thirty-one thousand, sixty-nine".