409448069 has 2 divisors, whose sum is σ = 409448070. Its totient is φ = 409448068.

The previous prime is 409448063. The next prime is 409448087. The reversal of 409448069 is 960844904.

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., 398800900 + 10647169 = 19970^2 + 3263^2 .

It is a cyclic number.

It is not a de Polignac number, because 409448069 - 2⁸ = 409447813 is a prime.

It is a super-2 number, since 2×409448069² = 335295442415657522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409448063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204724034 + 204724035.

It is an arithmetic number, because the mean of its divisors is an integer number (204724035).

Almost surely, 2^409448069 is an apocalyptic number.

It is an amenable number.

409448069 is a deficient number, since it is larger than the sum of its proper divisors (1).

409448069 is an equidigital number, since it uses as much as digits as its factorization.

409448069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 409448069 is about 20234.8231768899. The cubic root of 409448069 is about 742.5623789453.

The spelling of 409448069 in words is "four hundred nine million, four hundred forty-eight thousand, sixty-nine".