109865889 has 36 divisors (see below), whose sum is σ = 191462544. Its totient is φ = 62773704.

The previous prime is 109865887. The next prime is 109865893. The reversal of 109865889 is 988568901.

It is not a de Polignac number, because 109865889 - 2¹ = 109865887 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109865887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7294 + ... + 16520.

It is an arithmetic number, because the mean of its divisors is an integer number (5318404).

Almost surely, 2^109865889 is an apocalyptic number.

It is an amenable number.

109865889 is a deficient number, since it is larger than the sum of its proper divisors (81596655).

109865889 is an frugal number, since it uses more digits than its factorization.

109865889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9256 (or 9237 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The square root of 109865889 is about 10481.6930407258. The cubic root of 109865889 is about 478.9471846672.

The spelling of 109865889 in words is "one hundred nine million, eight hundred sixty-five thousand, eight hundred eighty-nine".