7993251613 has 2 divisors, whose sum is σ = 7993251614. Its totient is φ = 7993251612.

The previous prime is 7993251589. The next prime is 7993251647. The reversal of 7993251613 is 3161523997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7238266084 + 754985529 = 85078^2 + 27477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7993251613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7993251313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3996625806 + 3996625807.

It is an arithmetic number, because the mean of its divisors is an integer number (3996625807).

Almost surely, 2^7993251613 is an apocalyptic number.

It is an amenable number.

7993251613 is a deficient number, since it is larger than the sum of its proper divisors (1).

7993251613 is an equidigital number, since it uses as much as digits as its factorization.

7993251613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 46.

The square root of 7993251613 is about 89404.9865108205. The cubic root of 7993251613 is about 1999.4374762150.

The spelling of 7993251613 in words is "seven billion, nine hundred ninety-three million, two hundred fifty-one thousand, six hundred thirteen".