979197897928 has 32 divisors (see below), whose sum is σ = 1840673048760. Its totient is φ = 488352291840.

The previous prime is 979197897913. The next prime is 979197897929. The reversal of 979197897928 is 829798791979.

It can be written as a sum of positive squares in 4 ways, for example, as 649471586404 + 329726311524 = 805898^2 + 574218^2 .

It is a super-2 number, since 2×979197897928² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (979197897929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15615598 + ... + 15678178.

Almost surely, 2^979197897928 is an apocalyptic number.

It is an amenable number.

979197897928 is a deficient number, since it is larger than the sum of its proper divisors (861475150832).

979197897928 is a wasteful number, since it uses less digits than its factorization.

979197897928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67537 (or 67533 counting only the distinct ones).

The product of its digits is 2592487296, while the sum is 85.

The spelling of 979197897928 in words is "nine hundred seventy-nine billion, one hundred ninety-seven million, eight hundred ninety-seven thousand, nine hundred twenty-eight".