99989998 has 16 divisors (see below), whose sum is σ = 153180000. Its totient is φ = 48940416.

The previous prime is 99989983. The next prime is 99990001. The reversal of 99989998 is 89998999.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17503 + ... + 22501.

It is an arithmetic number, because the mean of its divisors is an integer number (9573750).

Almost surely, 2^99989998 is an apocalyptic number.

99989998 is a deficient number, since it is larger than the sum of its proper divisors (53190002).

99989998 is a wasteful number, since it uses less digits than its factorization.

99989998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211.

The product of its digits is 34012224, while the sum is 70.

The square root of 99989998 is about 9999.4998874944. The cubic root of 99989998 is about 464.1434077881.

Subtracting from 99989998 its reverse (89998999), we obtain a palindrome (9990999).

The spelling of 99989998 in words is "ninety-nine million, nine hundred eighty-nine thousand, nine hundred ninety-eight".