79687079137 has 2 divisors, whose sum is σ = 79687079138. Its totient is φ = 79687079136.

The previous prime is 79687079123. The next prime is 79687079161. The reversal of 79687079137 is 73197078697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59556009681 + 20131069456 = 244041^2 + 141884^2 .

It is a cyclic number.

It is not a de Polignac number, because 79687079137 - 2⁷ = 79687079009 is a prime.

It is not a weakly prime, because it can be changed into another prime (79687079107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39843539568 + 39843539569.

It is an arithmetic number, because the mean of its divisors is an integer number (39843539569).

Almost surely, 2^79687079137 is an apocalyptic number.

It is an amenable number.

79687079137 is a deficient number, since it is larger than the sum of its proper divisors (1).

79687079137 is an equidigital number, since it uses as much as digits as its factorization.

79687079137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28005264, while the sum is 64.

The spelling of 79687079137 in words is "seventy-nine billion, six hundred eighty-seven million, seventy-nine thousand, one hundred thirty-seven".