764801893 has 2 divisors, whose sum is σ = 764801894. Its totient is φ = 764801892.

The previous prime is 764801887. The next prime is 764801929. The reversal of 764801893 is 398108467.

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., 574417089 + 190384804 = 23967^2 + 13798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-764801893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764801393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382400946 + 382400947.

It is an arithmetic number, because the mean of its divisors is an integer number (382400947).

Almost surely, 2^764801893 is an apocalyptic number.

It is an amenable number.

764801893 is a deficient number, since it is larger than the sum of its proper divisors (1).

764801893 is an equidigital number, since it uses as much as digits as its factorization.

764801893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 764801893 is about 27655.0518531425. The cubic root of 764801893 is about 914.4984732016.

The spelling of 764801893 in words is "seven hundred sixty-four million, eight hundred one thousand, eight hundred ninety-three".