989898989898989 is nontrivially palindromic in base 10.
989898989898989 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
989898989898989 is an undulating number in base 10.
It is a congruent number.
Almost surely, 2989898989898989 is an apocalyptic number.
It is an amenable number.
989898989898989 is a wasteful number, since it uses less digits than its factorization.
989898989898989 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 173048334.
The spelling of 989898989898989 in words is "nine hundred eighty-nine trillion, eight hundred ninety-eight billion, nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-nine".