764645213 has 2 divisors, whose sum is σ = 764645214. Its totient is φ = 764645212.

The previous prime is 764645183. The next prime is 764645237. The reversal of 764645213 is 312546467.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388168804 + 376476409 = 19702^2 + 19403^2 .

It is a cyclic number.

It is not a de Polignac number, because 764645213 - 2¹² = 764641117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764644213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382322606 + 382322607.

It is an arithmetic number, because the mean of its divisors is an integer number (382322607).

Almost surely, 2^764645213 is an apocalyptic number.

It is an amenable number.

764645213 is a deficient number, since it is larger than the sum of its proper divisors (1).

764645213 is an equidigital number, since it uses as much as digits as its factorization.

764645213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 38.

The square root of 764645213 is about 27652.2189525542. The cubic root of 764645213 is about 914.4360198144.

The spelling of 764645213 in words is "seven hundred sixty-four million, six hundred forty-five thousand, two hundred thirteen".