109111988 has 24 divisors (see below), whose sum is σ = 196132104. Its totient is φ = 53081600.

The previous prime is 109111963. The next prime is 109111991. The reversal of 109111988 is 889111901.

It can be written as a sum of positive squares in 4 ways, for example, as 702244 + 108409744 = 838^2 + 10412^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84806 + ... + 86082.

It is an arithmetic number, because the mean of its divisors is an integer number (8172171).

Almost surely, 2^109111988 is an apocalyptic number.

It is an amenable number.

109111988 is a deficient number, since it is larger than the sum of its proper divisors (87020116).

109111988 is a wasteful number, since it uses less digits than its factorization.

109111988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843 (or 1841 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 38.

The square root of 109111988 is about 10445.6683845506. The cubic root of 109111988 is about 477.8491555559.

The spelling of 109111988 in words is "one hundred nine million, one hundred eleven thousand, nine hundred eighty-eight".