809465089 has 2 divisors, whose sum is σ = 809465090. Its totient is φ = 809465088.

The previous prime is 809465077. The next prime is 809465093. The reversal of 809465089 is 980564908.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 773284864 + 36180225 = 27808^2 + 6015^2 .

It is a cyclic number.

It is not a de Polignac number, because 809465089 - 2¹⁷ = 809334017 is a prime.

It is not a weakly prime, because it can be changed into another prime (809465039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404732544 + 404732545.

It is an arithmetic number, because the mean of its divisors is an integer number (404732545).

Almost surely, 2^809465089 is an apocalyptic number.

It is an amenable number.

809465089 is a deficient number, since it is larger than the sum of its proper divisors (1).

809465089 is an equidigital number, since it uses as much as digits as its factorization.

809465089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 809465089 is about 28451.0999611614. The cubic root of 809465089 is about 931.9645099523.

The spelling of 809465089 in words is "eight hundred nine million, four hundred sixty-five thousand, eighty-nine".