9979564 has 24 divisors (see below), whose sum is σ = 20448288. Its totient is φ = 4172160.

The previous prime is 9979553. The next prime is 9979577. The reversal of 9979564 is 4659799.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3199 + ... + 5494.

It is an arithmetic number, because the mean of its divisors is an integer number (852012).

Almost surely, 2^9979564 is an apocalyptic number.

It is an amenable number.

9979564 is an abundant number, since it is smaller than the sum of its proper divisors (10468724).

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

9979564 is a wasteful number, since it uses less digits than its factorization.

9979564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8745 (or 8743 counting only the distinct ones).

The product of its digits is 612360, while the sum is 49.

The square root of 9979564 is about 3159.0447923383. The cubic root of 9979564 is about 215.2966088255.

The spelling of 9979564 in words is "nine million, nine hundred seventy-nine thousand, five hundred sixty-four".