9898181 has 8 divisors (see below), whose sum is σ = 10137600. Its totient is φ = 9661680.

The previous prime is 9898177. The next prime is 9898223. The reversal of 9898181 is 1818989.

It is a happy number.

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

It is not a de Polignac number, because 9898181 - 2² = 9898177 is a prime.

It is a super-2 number, since 2×9898181² = 195947974217522, 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 (9898151) 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, 7100 + ... + 8378.

It is an arithmetic number, because the mean of its divisors is an integer number (1267200).

Almost surely, 2^9898181 is an apocalyptic number.

It is an amenable number.

9898181 is a deficient number, since it is larger than the sum of its proper divisors (239419).

9898181 is a wasteful number, since it uses less digits than its factorization.

9898181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459.

The product of its digits is 41472, while the sum is 44.

The square root of 9898181 is about 3146.1374731566. The cubic root of 9898181 is about 214.7097652214.

The spelling of 9898181 in words is "nine million, eight hundred ninety-eight thousand, one hundred eighty-one".