764495993 has 2 divisors, whose sum is σ = 764495994. Its totient is φ = 764495992.

The previous prime is 764495987. The next prime is 764496013. The reversal of 764495993 is 399594467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 763803769 + 692224 = 27637^2 + 832^2 .

It is an emirp because it is prime and its reverse (399594467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 764495993 - 2¹⁴ = 764479609 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (764495923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382247996 + 382247997.

It is an arithmetic number, because the mean of its divisors is an integer number (382247997).

Almost surely, 2^764495993 is an apocalyptic number.

It is an amenable number.

764495993 is a deficient number, since it is larger than the sum of its proper divisors (1).

764495993 is an equidigital number, since it uses as much as digits as its factorization.

764495993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 56.

The square root of 764495993 is about 27649.5206649229. The cubic root of 764495993 is about 914.3765320861.

The spelling of 764495993 in words is "seven hundred sixty-four million, four hundred ninety-five thousand, nine hundred ninety-three".