979172985 has 16 divisors (see below), whose sum is σ = 1790487936. Its totient is φ = 447621888.

The previous prime is 979172981. The next prime is 979173007. The reversal of 979172985 is 589271979.

979172985 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 979172985 - 2² = 979172981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (979172981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4662624 + ... + 4662833.

It is an arithmetic number, because the mean of its divisors is an integer number (111905496).

Almost surely, 2^979172985 is an apocalyptic number.

It is an amenable number.

979172985 is a deficient number, since it is larger than the sum of its proper divisors (811314951).

979172985 is a wasteful number, since it uses less digits than its factorization.

979172985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9325472.

The product of its digits is 2857680, while the sum is 57.

The square root of 979172985 is about 31291.7398845127. The cubic root of 979172985 is about 993.0089000864.

The spelling of 979172985 in words is "nine hundred seventy-nine million, one hundred seventy-two thousand, nine hundred eighty-five".