9898668989 has 16 divisors (see below), whose sum is σ = 10884174336. Its totient is φ = 8927646000.

The previous prime is 9898668973. The next prime is 9898669021.

9898668989 is nontrivially palindromic in base 10.

9898668989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9898668989 - 2⁴ = 9898668973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9898668289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 999914 + ... + 1009764.

It is an arithmetic number, because the mean of its divisors is an integer number (680260896).

Almost surely, 2^9898668989 is an apocalyptic number.

It is an amenable number.

9898668989 is a deficient number, since it is larger than the sum of its proper divisors (985505347).

9898668989 is a wasteful number, since it uses less digits than its factorization.

9898668989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10576.

The product of its digits is 967458816, while the sum is 80.

The square root of 9898668989 is about 99492.0549038967. The cubic root of 9898668989 is about 2147.1329362333.

The spelling of 9898668989 in words is "nine billion, eight hundred ninety-eight million, six hundred sixty-eight thousand, nine hundred eighty-nine".