9898989 has 8 divisors (see below), whose sum is σ = 13219392. Its totient is φ = 6588960.

The previous prime is 9898979. The next prime is 9899003.

9898989 is nontrivially palindromic in base 10.

9898989 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is not a de Polignac number, because 9898989 - 2¹² = 9894893 is a prime.

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

9898989 is an undulating number in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9898979) 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, 9 + ... + 4449.

It is an arithmetic number, because the mean of its divisors is an integer number (1652424).

Almost surely, 2^9898989 is an apocalyptic number.

It is an amenable number.

9898989 is a deficient number, since it is larger than the sum of its proper divisors (3320403).

9898989 is a wasteful number, since it uses less digits than its factorization.

9898989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187.

The product of its digits is 3359232, while the sum is 60.

The square root of 9898989 is about 3146.2658819623. The cubic root of 9898989 is about 214.7156073982.

The spelling of 9898989 in words is "nine million, eight hundred ninety-eight thousand, nine hundred eighty-nine".