978697796879 has 4 divisors (see below), whose sum is σ = 1067670323880. Its totient is φ = 889725269880.

The previous prime is 978697796789. The next prime is 978697796899.

978697796879 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 978697796879 - 2⁸ = 978697796623 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 (978697796899) 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, 44486263484 + ... + 44486263505.

It is an arithmetic number, because the mean of its divisors is an integer number (266917580970).

Almost surely, 2^978697796879 is an apocalyptic number.

978697796879 is a deficient number, since it is larger than the sum of its proper divisors (88972527001).

978697796879 is a wasteful number, since it uses less digits than its factorization.

978697796879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88972527000.

The product of its digits is 36294822144, while the sum is 92.

The spelling of 978697796879 in words is "nine hundred seventy-eight billion, six hundred ninety-seven million, seven hundred ninety-six thousand, eight hundred seventy-nine".