7993078813 has 2 divisors, whose sum is σ = 7993078814. Its totient is φ = 7993078812.

The previous prime is 7993078801. The next prime is 7993078823. The reversal of 7993078813 is 3188703997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5812842564 + 2180236249 = 76242^2 + 46693^2 .

It is a cyclic number.

It is not a de Polignac number, because 7993078813 - 2¹³ = 7993070621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7993078823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3996539406 + 3996539407.

It is an arithmetic number, because the mean of its divisors is an integer number (3996539407).

Almost surely, 2^7993078813 is an apocalyptic number.

It is an amenable number.

7993078813 is a deficient number, since it is larger than the sum of its proper divisors (1).

7993078813 is an equidigital number, since it uses as much as digits as its factorization.

7993078813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 7993078813 is about 89404.0201165473. The cubic root of 7993078813 is about 1999.4230680074.

The spelling of 7993078813 in words is "seven billion, nine hundred ninety-three million, seventy-eight thousand, eight hundred thirteen".