989898987898 has 4 divisors (see below), whose sum is σ = 1484848481850. Its totient is φ = 494949493948.

The previous prime is 989898987877. The next prime is 989898987901. The reversal of 989898987898 is 898789898989.

989898987898 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 can be written as a sum of positive squares in only one way, i.e., 868730251249 + 121168736649 = 932057^2 + 348093^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247474746973 + ... + 247474746976.

Almost surely, 2^989898987898 is an apocalyptic number.

989898987898 is a deficient number, since it is larger than the sum of its proper divisors (494949493952).

989898987898 is a wasteful number, since it uses less digits than its factorization.

989898987898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494949493951.

The product of its digits is 108355387392, while the sum is 100.

The spelling of 989898987898 in words is "nine hundred eighty-nine billion, eight hundred ninety-eight million, nine hundred eighty-seven thousand, eight hundred ninety-eight".