79986268997 has 4 divisors (see below), whose sum is σ = 79989122976. Its totient is φ = 79983415020.

The previous prime is 79986268981. The next prime is 79986269029.

79986268997 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 a cyclic number.

It is not a de Polignac number, because 79986268997 - 2⁴ = 79986268981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79986268937) 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, 1384529 + ... + 1441142.

It is an arithmetic number, because the mean of its divisors is an integer number (19997280744).

Almost surely, 2^79986268997 is an apocalyptic number.

It is an amenable number.

79986268997 is a deficient number, since it is larger than the sum of its proper divisors (2853979).

79986268997 is a wasteful number, since it uses less digits than its factorization.

79986268997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853978.

The product of its digits is 1481421312, while the sum is 80.

The spelling of 79986268997 in words is "seventy-nine billion, nine hundred eighty-six million, two hundred sixty-eight thousand, nine hundred ninety-seven".