9888981 has 8 divisors (see below), whose sum is σ = 13274400. Its totient is φ = 6548112.

The previous prime is 9888979. The next prime is 9888997. The reversal of 9888981 is 1898889.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9888981 - 2¹ = 9888979 is a prime.

It is a super-2 number, since 2×9888981² = 195583890436722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9888961) 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 7 ways as a sum of consecutive naturals, for example, 10615 + ... + 11508.

It is an arithmetic number, because the mean of its divisors is an integer number (1659300).

Almost surely, 2^9888981 is an apocalyptic number.

It is an amenable number.

9888981 is a deficient number, since it is larger than the sum of its proper divisors (3385419).

9888981 is a wasteful number, since it uses less digits than its factorization.

9888981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22275.

The product of its digits is 331776, while the sum is 51.

The square root of 9888981 is about 3144.6750229555. The cubic root of 9888981 is about 214.6432229562.

The spelling of 9888981 in words is "nine million, eight hundred eighty-eight thousand, nine hundred eighty-one".