764779313 has 2 divisors, whose sum is σ = 764779314. Its totient is φ = 764779312.

The previous prime is 764779297. The next prime is 764779321. The reversal of 764779313 is 313977467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 567011344 + 197767969 = 23812^2 + 14063^2 .

It is a cyclic number.

It is not a de Polignac number, because 764779313 - 2⁴ = 764779297 is a prime.

It is not a weakly prime, because it can be changed into another prime (764779333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382389656 + 382389657.

It is an arithmetic number, because the mean of its divisors is an integer number (382389657).

Almost surely, 2^764779313 is an apocalyptic number.

It is an amenable number.

764779313 is a deficient number, since it is larger than the sum of its proper divisors (1).

764779313 is an equidigital number, since it uses as much as digits as its factorization.

764779313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 47.

The square root of 764779313 is about 27654.6436064542. The cubic root of 764779313 is about 914.4894732332.

The spelling of 764779313 in words is "seven hundred sixty-four million, seven hundred seventy-nine thousand, three hundred thirteen".