409028569 has 2 divisors, whose sum is σ = 409028570. Its totient is φ = 409028568.

The previous prime is 409028509. The next prime is 409028597. The reversal of 409028569 is 965820904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295392969 + 113635600 = 17187^2 + 10660^2 .

It is a cyclic number.

It is not a de Polignac number, because 409028569 - 2¹¹ = 409026521 is a prime.

It is a super-2 number, since 2×409028569² = 334608740516375522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (409028509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204514284 + 204514285.

It is an arithmetic number, because the mean of its divisors is an integer number (204514285).

Almost surely, 2^409028569 is an apocalyptic number.

It is an amenable number.

409028569 is a deficient number, since it is larger than the sum of its proper divisors (1).

409028569 is an equidigital number, since it uses as much as digits as its factorization.

409028569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 409028569 is about 20224.4547268894. The cubic root of 409028569 is about 742.3086948713.

The spelling of 409028569 in words is "four hundred nine million, twenty-eight thousand, five hundred sixty-nine".