9986181 has 8 divisors (see below), whose sum is σ = 13497600. Its totient is φ = 6566112.

The previous prime is 9986161. The next prime is 9986183. The reversal of 9986181 is 1816899.

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

It is not a de Polignac number, because 9986181 - 2⁹ = 9985669 is a prime.

It is a super-2 number, since 2×9986181² = 199447621929522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22581 + ... + 23018.

It is an arithmetic number, because the mean of its divisors is an integer number (1687200).

Almost surely, 2^9986181 is an apocalyptic number.

It is an amenable number.

9986181 is a deficient number, since it is larger than the sum of its proper divisors (3511419).

9986181 is a wasteful number, since it uses less digits than its factorization.

9986181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45675.

The product of its digits is 31104, while the sum is 42.

The square root of 9986181 is about 3160.0919290426. The cubic root of 9986181 is about 215.3441828113.

The spelling of 9986181 in words is "nine million, nine hundred eighty-six thousand, one hundred eighty-one".