9979984 has 20 divisors (see below), whose sum is σ = 22098784. Its totient is φ = 4277088.

The previous prime is 9979967. The next prime is 9979993. The reversal of 9979984 is 4899799.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44442 + ... + 44665.

Almost surely, 2^9979984 is an apocalyptic number.

It is an amenable number.

9979984 is an abundant number, since it is smaller than the sum of its proper divisors (12118800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9979984 is a wasteful number, since it uses less digits than its factorization.

9979984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89122 (or 89116 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 55.

The square root of 9979984 is about 3159.1112674295. Note that the first 3 decimals coincide. The cubic root of 9979984 is about 215.2996291080.

The spelling of 9979984 in words is "nine million, nine hundred seventy-nine thousand, nine hundred eighty-four".