9984181 has 4 divisors (see below), whose sum is σ = 9997164. Its totient is φ = 9971200.

The previous prime is 9984179. The next prime is 9984187. The reversal of 9984181 is 1814899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2531281 + 7452900 = 1591^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 9984181 - 2¹ = 9984179 is a prime.

It is a super-2 number, since 2×9984181² = 199367740481522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9984187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5260 + ... + 6901.

It is an arithmetic number, because the mean of its divisors is an integer number (2499291).

Almost surely, 2^9984181 is an apocalyptic number.

It is an amenable number.

9984181 is a deficient number, since it is larger than the sum of its proper divisors (12983).

9984181 is a wasteful number, since it uses less digits than its factorization.

9984181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12982.

The product of its digits is 20736, while the sum is 40.

The square root of 9984181 is about 3159.7754667065. The cubic root of 9984181 is about 215.3298057062.

The spelling of 9984181 in words is "nine million, nine hundred eighty-four thousand, one hundred eighty-one".