79687079393 has 2 divisors, whose sum is σ = 79687079394. Its totient is φ = 79687079392.

The previous prime is 79687079387. The next prime is 79687079411. The reversal of 79687079393 is 39397078697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75656353249 + 4030726144 = 275057^2 + 63488^2 .

It is a cyclic number.

It is not a de Polignac number, because 79687079393 - 2⁸ = 79687079137 is a prime.

It is not a weakly prime, because it can be changed into another prime (79687079323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39843539696 + 39843539697.

It is an arithmetic number, because the mean of its divisors is an integer number (39843539697).

Almost surely, 2^79687079393 is an apocalyptic number.

It is an amenable number.

79687079393 is a deficient number, since it is larger than the sum of its proper divisors (1).

79687079393 is an equidigital number, since it uses as much as digits as its factorization.

79687079393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108020304, while the sum is 68.

The spelling of 79687079393 in words is "seventy-nine billion, six hundred eighty-seven million, seventy-nine thousand, three hundred ninety-three".