109161912 has 48 divisors (see below), whose sum is σ = 282051720. Its totient is φ = 35206080.

The previous prime is 109161901. The next prime is 109161917. The reversal of 109161912 is 219161901.

It is a self number, because there is not a number n which added to its sum of digits gives 109161912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109161917) 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 11 ways as a sum of consecutive naturals, for example, 20698 + ... + 25430.

Almost surely, 2^109161912 is an apocalyptic number.

109161912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109161912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141025860).

109161912 is an abundant number, since it is smaller than the sum of its proper divisors (172889808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109161912 is a wasteful number, since it uses less digits than its factorization.

109161912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4804 (or 4769 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 30.

The square root of 109161912 is about 10448.0578099473. The cubic root of 109161912 is about 477.9220241263.

The spelling of 109161912 in words is "one hundred nine million, one hundred sixty-one thousand, nine hundred twelve".