9989972 has 12 divisors (see below), whose sum is σ = 18402720. Its totient is φ = 4732056.

The previous prime is 9989957. The next prime is 9990017. The reversal of 9989972 is 2799899.

9989972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65648 + ... + 65799.

It is an arithmetic number, because the mean of its divisors is an integer number (1533560).

Almost surely, 2^9989972 is an apocalyptic number.

It is an amenable number.

9989972 is a deficient number, since it is larger than the sum of its proper divisors (8412748).

9989972 is a wasteful number, since it uses less digits than its factorization.

9989972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131470 (or 131468 counting only the distinct ones).

The product of its digits is 734832, while the sum is 53.

The square root of 9989972 is about 3160.6916964487. The cubic root of 9989972 is about 215.3714293471.

The spelling of 9989972 in words is "nine million, nine hundred eighty-nine thousand, nine hundred seventy-two".