9885981 has 32 divisors (see below), whose sum is σ = 15667200. Its totient is φ = 5428800.

The previous prime is 9885979. The next prime is 9885989. The reversal of 9885981 is 1895889.

It is not a de Polignac number, because 9885981 - 2¹ = 9885979 is a prime.

It is a super-2 number, since 2×9885981² = 195465240664722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9885981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9885989) 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 31 ways as a sum of consecutive naturals, for example, 97831 + ... + 97931.

It is an arithmetic number, because the mean of its divisors is an integer number (489600).

Almost surely, 2^9885981 is an apocalyptic number.

It is an amenable number.

9885981 is a deficient number, since it is larger than the sum of its proper divisors (5781219).

9885981 is a wasteful number, since it uses less digits than its factorization.

9885981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249.

The product of its digits is 207360, while the sum is 48.

The square root of 9885981 is about 3144.1979899491. The cubic root of 9885981 is about 214.6215154687.

The spelling of 9885981 in words is "nine million, eight hundred eighty-five thousand, nine hundred eighty-one".