9898558989 has 16 divisors (see below), whose sum is σ = 14507817984. Its totient is φ = 5953329200.

The previous prime is 9898558981. The next prime is 9898559017.

9898558989 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 9898558989 - 2³ = 9898558981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9898558981) 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, 1140549 + ... + 1149194.

It is an arithmetic number, because the mean of its divisors is an integer number (906738624).

Almost surely, 2^9898558989 is an apocalyptic number.

It is an amenable number.

9898558989 is a deficient number, since it is larger than the sum of its proper divisors (4609258995).

9898558989 is a wasteful number, since it uses less digits than its factorization.

9898558989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289888.

The product of its digits is 671846400, while the sum is 78.

The square root of 9898558989 is about 99491.5020944000. The cubic root of 9898558989 is about 2147.1249827903.

The spelling of 9898558989 in words is "nine billion, eight hundred ninety-eight million, five hundred fifty-eight thousand, nine hundred eighty-nine".