764131393 has 2 divisors, whose sum is σ = 764131394. Its totient is φ = 764131392.

The previous prime is 764131373. The next prime is 764131397. The reversal of 764131393 is 393131467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 760490929 + 3640464 = 27577^2 + 1908^2 .

It is a cyclic number.

It is not a de Polignac number, because 764131393 - 2⁹ = 764130881 is a prime.

It is not a weakly prime, because it can be changed into another prime (764131397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382065696 + 382065697.

It is an arithmetic number, because the mean of its divisors is an integer number (382065697).

Almost surely, 2^764131393 is an apocalyptic number.

It is an amenable number.

764131393 is a deficient number, since it is larger than the sum of its proper divisors (1).

764131393 is an equidigital number, since it uses as much as digits as its factorization.

764131393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 37.

The square root of 764131393 is about 27642.9266359407. The cubic root of 764131393 is about 914.2311488536.

The spelling of 764131393 in words is "seven hundred sixty-four million, one hundred thirty-one thousand, three hundred ninety-three".