9988998899 has 8 divisors (see below), whose sum is σ = 10898716080. Its totient is φ = 9079552800.

The previous prime is 9988998893. The next prime is 9988998917.

9988998899 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9988998899 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9988998899.

It is not an unprimeable number, because it can be changed into a prime (9988998893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13529 + ... + 141989.

It is an arithmetic number, because the mean of its divisors is an integer number (1362339510).

Almost surely, 2^9988998899 is an apocalyptic number.

9988998899 is a deficient number, since it is larger than the sum of its proper divisors (909717181).

9988998899 is a wasteful number, since it uses less digits than its factorization.

9988998899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135541.

The product of its digits is 2176782336, while the sum is 86.

The square root of 9988998899 is about 99944.9793586451. The cubic root of 9988998899 is about 2153.6443616908.

The spelling of 9988998899 in words is "nine billion, nine hundred eighty-eight million, nine hundred ninety-eight thousand, eight hundred ninety-nine".