109999989 has 24 divisors (see below), whose sum is σ = 174096000. Its totient is φ = 66373440.

The previous prime is 109999957. The next prime is 109999993. The reversal of 109999989 is 989999901.

It is not a de Polignac number, because 109999989 - 2⁵ = 109999957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109999489) 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 23 ways as a sum of consecutive naturals, for example, 21337 + ... + 25985.

It is an arithmetic number, because the mean of its divisors is an integer number (7254000).

Almost surely, 2^109999989 is an apocalyptic number.

It is an amenable number.

109999989 is a deficient number, since it is larger than the sum of its proper divisors (64096011).

109999989 is a wasteful number, since it uses less digits than its factorization.

109999989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905 (or 4902 counting only the distinct ones).

The product of its (nonzero) digits is 4251528, while the sum is 63.

The square root of 109999989 is about 10488.0879572971. The cubic root of 109999989 is about 479.1419697349.

It can be divided in two parts, 10 and 9999989, that added together give a palindrome (9999999).

The spelling of 109999989 in words is "one hundred nine million, nine hundred ninety-nine thousand, nine hundred eighty-nine".