764617769 has 2 divisors, whose sum is σ = 764617770. Its totient is φ = 764617768.

The previous prime is 764617751. The next prime is 764617771. The reversal of 764617769 is 967716467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 733759744 + 30858025 = 27088^2 + 5555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-764617769 is a prime.

It is a super-2 number, since 2×764617769² = 1169280665341074722, which contains 22 as substring.

Together with 764617771, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 764617769.

It is not a weakly prime, because it can be changed into another prime (764617739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382308884 + 382308885.

It is an arithmetic number, because the mean of its divisors is an integer number (382308885).

Almost surely, 2^764617769 is an apocalyptic number.

It is an amenable number.

764617769 is a deficient number, since it is larger than the sum of its proper divisors (1).

764617769 is an equidigital number, since it uses as much as digits as its factorization.

764617769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 53.

The square root of 764617769 is about 27651.7227130608. The cubic root of 764617769 is about 914.4250796284.

The spelling of 764617769 in words is "seven hundred sixty-four million, six hundred seventeen thousand, seven hundred sixty-nine".