9988975 has 12 divisors (see below), whose sum is σ = 12786880. Its totient is φ = 7732800.

The previous prime is 9988973. The next prime is 9988981. The reversal of 9988975 is 5798899.

It is not a de Polignac number, because 9988975 - 2¹ = 9988973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5670 + ... + 7219.

Almost surely, 2^9988975 is an apocalyptic number.

9988975 is a deficient number, since it is larger than the sum of its proper divisors (2797905).

9988975 is a wasteful number, since it uses less digits than its factorization.

9988975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12930 (or 12925 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 55.

The square root of 9988975 is about 3160.5339738721. The cubic root of 9988975 is about 215.3642644135.

The spelling of 9988975 in words is "nine million, nine hundred eighty-eight thousand, nine hundred seventy-five".