79679897697 has 4 divisors (see below), whose sum is σ = 106239863600. Its totient is φ = 53119931796.

The previous prime is 79679897653. The next prime is 79679897701.

It is a happy number.

79679897697 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 79679897697 - 2²⁸ = 79411462241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79679895697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13279982947 + ... + 13279982952.

It is an arithmetic number, because the mean of its divisors is an integer number (26559965900).

Almost surely, 2^79679897697 is an apocalyptic number.

It is an amenable number.

79679897697 is a deficient number, since it is larger than the sum of its proper divisors (26559965903).

79679897697 is a wasteful number, since it uses less digits than its factorization.

79679897697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26559965902.

The product of its digits is 4536852768, while the sum is 84.

The spelling of 79679897697 in words is "seventy-nine billion, six hundred seventy-nine million, eight hundred ninety-seven thousand, six hundred ninety-seven".