9898981 has 12 divisors (see below), whose sum is σ = 11068812. Its totient is φ = 8820864.

The previous prime is 9898979. The next prime is 9899003. The reversal of 9898981 is 1898989.

It can be written as a sum of positive squares in 2 ways, for example, as 6974881 + 2924100 = 2641^2 + 1710^2 .

It is not a de Polignac number, because 9898981 - 2¹ = 9898979 is a prime.

It is a super-2 number, since 2×9898981² = 195979649676722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9898921) 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 11 ways as a sum of consecutive naturals, for example, 5331 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (922401).

Almost surely, 2^9898981 is an apocalyptic number.

It is an amenable number.

9898981 is a deficient number, since it is larger than the sum of its proper divisors (1169831).

9898981 is a wasteful number, since it uses less digits than its factorization.

9898981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668 (or 1649 counting only the distinct ones).

The product of its digits is 373248, while the sum is 52.

The square root of 9898981 is about 3146.2646106137. The cubic root of 9898981 is about 214.7155495564.

The spelling of 9898981 in words is "nine million, eight hundred ninety-eight thousand, nine hundred eighty-one".