765575989 has 2 divisors, whose sum is σ = 765575990. Its totient is φ = 765575988.

The previous prime is 765575971. The next prime is 765576013. The reversal of 765575989 is 989575567.

765575989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666414225 + 99161764 = 25815^2 + 9958^2 .

It is a cyclic number.

It is not a de Polignac number, because 765575989 - 2¹³ = 765567797 is a prime.

It is a super-2 number, since 2×765575989² = 1172213189866656242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (765575389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382787994 + 382787995.

It is an arithmetic number, because the mean of its divisors is an integer number (382787995).

Almost surely, 2^765575989 is an apocalyptic number.

It is an amenable number.

765575989 is a deficient number, since it is larger than the sum of its proper divisors (1).

765575989 is an equidigital number, since it uses as much as digits as its factorization.

765575989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814000, while the sum is 61.

The square root of 765575989 is about 27669.0438757829. The cubic root of 765575989 is about 914.8069064109.

The spelling of 765575989 in words is "seven hundred sixty-five million, five hundred seventy-five thousand, nine hundred eighty-nine".