764123191717 has 2 divisors, whose sum is σ = 764123191718. Its totient is φ = 764123191716.

The previous prime is 764123191709. The next prime is 764123191723. The reversal of 764123191717 is 717191321467.

764123191717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409003737156 + 355119454561 = 639534^2 + 595919^2 .

It is a cyclic number.

It is not a de Polignac number, because 764123191717 - 2³ = 764123191709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764123191757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382061595858 + 382061595859.

It is an arithmetic number, because the mean of its divisors is an integer number (382061595859).

Almost surely, 2^764123191717 is an apocalyptic number.

It is an amenable number.

764123191717 is a deficient number, since it is larger than the sum of its proper divisors (1).

764123191717 is an equidigital number, since it uses as much as digits as its factorization.

764123191717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 49.

The spelling of 764123191717 in words is "seven hundred sixty-four billion, one hundred twenty-three million, one hundred ninety-one thousand, seven hundred seventeen".