765842213 has 2 divisors, whose sum is σ = 765842214. Its totient is φ = 765842212.

The previous prime is 765842191. The next prime is 765842249. The reversal of 765842213 is 312248567.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 691847809 + 73994404 = 26303^2 + 8602^2 .

It is a cyclic number.

It is not a de Polignac number, because 765842213 - 2⁶ = 765842149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (765842263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382921106 + 382921107.

It is an arithmetic number, because the mean of its divisors is an integer number (382921107).

Almost surely, 2^765842213 is an apocalyptic number.

It is an amenable number.

765842213 is a deficient number, since it is larger than the sum of its proper divisors (1).

765842213 is an equidigital number, since it uses as much as digits as its factorization.

765842213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 765842213 is about 27673.8543213626. The cubic root of 765842213 is about 914.9129334774.

The spelling of 765842213 in words is "seven hundred sixty-five million, eight hundred forty-two thousand, two hundred thirteen".