9998975 has 24 divisors (see below), whose sum is σ = 15007968. Its totient is φ = 6451200.

The previous prime is 9998971. The next prime is 9998977. The reversal of 9998975 is 5798999.

It is not a de Polignac number, because 9998975 - 2² = 9998971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9998975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1295 + ... + 4655.

It is an arithmetic number, because the mean of its divisors is an integer number (625332).

Almost surely, 2^9998975 is an apocalyptic number.

9998975 is a deficient number, since it is larger than the sum of its proper divisors (5008993).

9998975 is a wasteful number, since it uses less digits than its factorization.

9998975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395 (or 3390 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 56.

The square root of 9998975 is about 3162.1155892851. The cubic root of 9998975 is about 215.4361077665.

The spelling of 9998975 in words is "nine million, nine hundred ninety-eight thousand, nine hundred seventy-five".