98988989 has 16 divisors (see below), whose sum is σ = 110013120. Its totient is φ = 88320000.

The previous prime is 98988979. The next prime is 98988991.

98988989 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98988989 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 (98988959) 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, 154109 + ... + 154749.

It is an arithmetic number, because the mean of its divisors is an integer number (6875820).

Almost surely, 2^98988989 is an apocalyptic number.

It is an amenable number.

98988989 is a deficient number, since it is larger than the sum of its proper divisors (11024131).

98988989 is a wasteful number, since it uses less digits than its factorization.

98988989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its digits is 26873856, while the sum is 68.

The square root of 98988989 is about 9949.3210321107. The cubic root of 98988989 is about 462.5893495747.

The spelling of 98988989 in words is "ninety-eight million, nine hundred eighty-eight thousand, nine hundred eighty-nine".