764845957 has 2 divisors, whose sum is σ = 764845958. Its totient is φ = 764845956.

The previous prime is 764845909. The next prime is 764845987. The reversal of 764845957 is 759548467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655308801 + 109537156 = 25599^2 + 10466^2 .

It is an emirp because it is prime and its reverse (759548467) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-764845957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 764845898 and 764845907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764845987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382422978 + 382422979.

It is an arithmetic number, because the mean of its divisors is an integer number (382422979).

Almost surely, 2^764845957 is an apocalyptic number.

It is an amenable number.

764845957 is a deficient number, since it is larger than the sum of its proper divisors (1).

764845957 is an equidigital number, since it uses as much as digits as its factorization.

764845957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8467200, while the sum is 55.

The square root of 764845957 is about 27655.8485134700. The cubic root of 764845957 is about 914.5160357832.

The spelling of 764845957 in words is "seven hundred sixty-four million, eight hundred forty-five thousand, nine hundred fifty-seven".