8998989 has 8 divisors (see below), whose sum is σ = 12630240. Its totient is φ = 5683536.

The previous prime is 8998987. The next prime is 8998991. The reversal of 8998989 is 9898998.

It is an interprime number because it is at equal distance from previous prime (8998987) and next prime (8998991).

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

It is not a de Polignac number, because 8998989 - 2¹ = 8998987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8998987) 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, 78882 + ... + 78995.

It is an arithmetic number, because the mean of its divisors is an integer number (1578780).

Almost surely, 2^8998989 is an apocalyptic number.

It is an amenable number.

8998989 is a deficient number, since it is larger than the sum of its proper divisors (3631251).

8998989 is a wasteful number, since it uses less digits than its factorization.

8998989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157899.

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

The square root of 8998989 is about 2999.8314952677. The cubic root of 8998989 is about 208.0005932552. Note that the first 3 decimals are identical.

Subtracting 8998989 from its reverse (9898998), we obtain a palindrome (900009).

The spelling of 8998989 in words is "eight million, nine hundred ninety-eight thousand, nine hundred eighty-nine".