9981875 has 10 divisors (see below), whose sum is σ = 12474132. Its totient is φ = 7985000.

The previous prime is 9981869. The next prime is 9981889. The reversal of 9981875 is 5781899.

It is a happy number.

It is not a de Polignac number, because 9981875 - 2¹⁶ = 9916339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 7361 + ... + 8610.

Almost surely, 2^9981875 is an apocalyptic number.

9981875 is a deficient number, since it is larger than the sum of its proper divisors (2492257).

9981875 is an equidigital number, since it uses as much as digits as its factorization.

9981875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15991 (or 15976 counting only the distinct ones).

The product of its digits is 181440, while the sum is 47.

The square root of 9981875 is about 3159.4105462887. The cubic root of 9981875 is about 215.3132265208.

The spelling of 9981875 in words is "nine million, nine hundred eighty-one thousand, eight hundred seventy-five".