979797979797979 has 4 divisors (see below), whose sum is σ = 988468758380376. Its totient is φ = 971127201215584.

The previous prime is 979797979797937. The next prime is 979797979798051.

979797979797979 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 979797979797979 - 2¹⁵ = 979797979765211 is a prime.

It is a Duffinian number.

979797979797979 is an undulating number in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 979797979797979.

It is not an unprimeable number, because it can be changed into a prime (979797979767979) 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, 4335389291029 + ... + 4335389291254.

It is an arithmetic number, because the mean of its divisors is an integer number (247117189595094).

Almost surely, 2^{979797979797979} is an apocalyptic number.

979797979797979 is a deficient number, since it is larger than the sum of its proper divisors (8670778582397).

979797979797979 is a wasteful number, since it uses less digits than its factorization.

979797979797979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8670778582396.

The product of its digits is 35450825752503, while the sum is 121.

The spelling of 979797979797979 in words is "nine hundred seventy-nine trillion, seven hundred ninety-seven billion, nine hundred seventy-nine million, seven hundred ninety-seven thousand, nine hundred seventy-nine".