7893947513 has 2 divisors, whose sum is σ = 7893947514. Its totient is φ = 7893947512.

The previous prime is 7893947441. The next prime is 7893947527. The reversal of 7893947513 is 3157493987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7784179984 + 109767529 = 88228^2 + 10477^2 .

It is a cyclic number.

It is not a de Polignac number, because 7893947513 - 2²⁸ = 7625512057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7893947543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3946973756 + 3946973757.

It is an arithmetic number, because the mean of its divisors is an integer number (3946973757).

Almost surely, 2^7893947513 is an apocalyptic number.

It is an amenable number.

7893947513 is a deficient number, since it is larger than the sum of its proper divisors (1).

7893947513 is an equidigital number, since it uses as much as digits as its factorization.

7893947513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 56.

The square root of 7893947513 is about 88847.8897498416. The cubic root of 7893947513 is about 1991.1229500361.

The spelling of 7893947513 in words is "seven billion, eight hundred ninety-three million, nine hundred forty-seven thousand, five hundred thirteen".