8989898989 has 16 divisors (see below), whose sum is σ = 9348030720. Its totient is φ = 8639136000.

The previous prime is 8989898977. The next prime is 8989899007. The reversal of 8989898989 is 9898989898.

8989898989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

8989898989 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is not a de Polignac number, because 8989898989 - 2⁷ = 8989898861 is a prime.

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

It is a Duffinian number.

8989898989 is an undulating number in base 10.

8989898989 is a modest number, since divided by 898989 gives 8989 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8989898969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 984334 + ... + 993424.

It is an arithmetic number, because the mean of its divisors is an integer number (584251920).

Almost surely, 2^8989898989 is an apocalyptic number.

8989898989 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

8989898989 is a deficient number, since it is larger than the sum of its proper divisors (358131731).

8989898989 is a wasteful number, since it uses less digits than its factorization.

8989898989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9492.

The product of its digits is 1934917632, while the sum is 85.

The square root of 8989898989 is about 94815.0778568472. The cubic root of 8989898989 is about 2079.3053484252.

Subtracting 8989898989 from its reverse (9898989898), we obtain a palindrome (909090909).

The spelling of 8989898989 in words is "eight billion, nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-nine".