765065009 has 2 divisors, whose sum is σ = 765065010. Its totient is φ = 765065008.

The previous prime is 765064981. The next prime is 765065011. The reversal of 765065009 is 900560567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 613651984 + 151413025 = 24772^2 + 12305^2 .

It is a cyclic number.

It is not a de Polignac number, because 765065009 - 2²⁰ = 764016433 is a prime.

Together with 765065011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (765065029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382532504 + 382532505.

It is an arithmetic number, because the mean of its divisors is an integer number (382532505).

Almost surely, 2^765065009 is an apocalyptic number.

It is an amenable number.

765065009 is a deficient number, since it is larger than the sum of its proper divisors (1).

765065009 is an equidigital number, since it uses as much as digits as its factorization.

765065009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 765065009 is about 27659.8085495905. The cubic root of 765065009 is about 914.6033332942.

The spelling of 765065009 in words is "seven hundred sixty-five million, sixty-five thousand, nine".