979789915 has 16 divisors (see below), whose sum is σ = 1297076256. Its totient is φ = 705888000.

The previous prime is 979789913. The next prime is 979789961. The reversal of 979789915 is 519987979.

It is not a de Polignac number, because 979789915 - 2¹ = 979789913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (979789913) 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, 181161 + ... + 186490.

It is an arithmetic number, because the mean of its divisors is an integer number (81067266).

Almost surely, 2^979789915 is an apocalyptic number.

979789915 is a deficient number, since it is larger than the sum of its proper divisors (317286341).

979789915 is a wasteful number, since it uses less digits than its factorization.

979789915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367710.

The product of its digits is 12859560, while the sum is 64.

The square root of 979789915 is about 31301.5960455693. The cubic root of 979789915 is about 993.2174054186.

The spelling of 979789915 in words is "nine hundred seventy-nine million, seven hundred eighty-nine thousand, nine hundred fifteen".