765743213 has 2 divisors, whose sum is σ = 765743214. Its totient is φ = 765743212.

The previous prime is 765743179. The next prime is 765743219. The reversal of 765743213 is 312347567.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399480169 + 366263044 = 19987^2 + 19138^2 .

It is a cyclic number.

It is not a de Polignac number, because 765743213 - 2¹⁸ = 765481069 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (765743219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382871606 + 382871607.

It is an arithmetic number, because the mean of its divisors is an integer number (382871607).

Almost surely, 2^765743213 is an apocalyptic number.

It is an amenable number.

765743213 is a deficient number, since it is larger than the sum of its proper divisors (1).

765743213 is an equidigital number, since it uses as much as digits as its factorization.

765743213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 38.

The square root of 765743213 is about 27672.0655716193. The cubic root of 765743213 is about 914.8735083487.

The spelling of 765743213 in words is "seven hundred sixty-five million, seven hundred forty-three thousand, two hundred thirteen".