765668489 has 2 divisors, whose sum is σ = 765668490. Its totient is φ = 765668488.

The previous prime is 765668471. The next prime is 765668507. The reversal of 765668489 is 984866567.

It is a balanced prime because it is at equal distance from previous prime (765668471) and next prime (765668507).

It can be written as a sum of positive squares in only one way, i.e., 673662025 + 92006464 = 25955^2 + 9592^2 .

It is a cyclic number.

It is not a de Polignac number, because 765668489 - 2¹⁶ = 765602953 is a prime.

It is not a weakly prime, because it can be changed into another prime (765668089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382834244 + 382834245.

It is an arithmetic number, because the mean of its divisors is an integer number (382834245).

Almost surely, 2^765668489 is an apocalyptic number.

It is an amenable number.

765668489 is a deficient number, since it is larger than the sum of its proper divisors (1).

765668489 is an equidigital number, since it uses as much as digits as its factorization.

765668489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 59.

The square root of 765668489 is about 27670.7153684179. The cubic root of 765668489 is about 914.8437484889.

The spelling of 765668489 in words is "seven hundred sixty-five million, six hundred sixty-eight thousand, four hundred eighty-nine".