79797479797 has 4 divisors (see below), whose sum is σ = 91197119776. Its totient is φ = 68397839820.

The previous prime is 79797479779. The next prime is 79797479813.

79797479797 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 79797479797 - 2²³ = 79789091189 is a prime.

It is a super-2 number, since 2×79797479797² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79797479797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79797479767) 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, 5699819979 + ... + 5699819992.

It is an arithmetic number, because the mean of its divisors is an integer number (22799279944).

Almost surely, 2^79797479797 is an apocalyptic number.

It is an amenable number.

79797479797 is a deficient number, since it is larger than the sum of its proper divisors (11399639979).

79797479797 is a wasteful number, since it uses less digits than its factorization.

79797479797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11399639978.

The product of its digits is 3087580356, while the sum is 82.

The spelling of 79797479797 in words is "seventy-nine billion, seven hundred ninety-seven million, four hundred seventy-nine thousand, seven hundred ninety-seven".