79687678697 has 12 divisors (see below), whose sum is σ = 87628348080. Its totient is φ = 72412115160.

The previous prime is 79687678691. The next prime is 79687678723.

79687678697 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 79687678697 - 2¹² = 79687674601 is a prime.

It is a super-2 number, since 2×79687678697² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79687678691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142238 + ... + 423800.

It is an arithmetic number, because the mean of its divisors is an integer number (7302362340).

Almost surely, 2^79687678697 is an apocalyptic number.

It is an amenable number.

79687678697 is a deficient number, since it is larger than the sum of its proper divisors (7940669383).

79687678697 is a wasteful number, since it uses less digits than its factorization.

79687678697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283924 (or 283913 counting only the distinct ones).

The product of its digits is 2688505344, while the sum is 80.

The spelling of 79687678697 in words is "seventy-nine billion, six hundred eighty-seven million, six hundred seventy-eight thousand, six hundred ninety-seven".