99988899 has 8 divisors (see below), whose sum is σ = 135834192. Its totient is φ = 65401440.

The previous prime is 99988879. The next prime is 99988913. The reversal of 99988899 is 99888999.

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

It is not a de Polignac number, because 99988899 - 2⁷ = 99988771 is a prime.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99988829) 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 7 ways as a sum of consecutive naturals, for example, 314272 + ... + 314589.

It is an arithmetic number, because the mean of its divisors is an integer number (16979274).

Almost surely, 2^99988899 is an apocalyptic number.

99988899 is a deficient number, since it is larger than the sum of its proper divisors (35845293).

99988899 is a wasteful number, since it uses less digits than its factorization.

99988899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628917.

The product of its digits is 30233088, while the sum is 69.

The square root of 99988899 is about 9999.4449345951. Note that the first 3 decimals coincide. The cubic root of 99988899 is about 464.1417072998.

It can be divided in two parts, 999 and 88899, that added together give a palindrome (89898).

The spelling of 99988899 in words is "ninety-nine million, nine hundred eighty-eight thousand, eight hundred ninety-nine".