108943681 has 20 divisors (see below), whose sum is σ = 137085760. Its totient is φ = 84811320.

The previous prime is 108943669. The next prime is 108943687. The reversal of 108943681 is 186349801.

It is not a de Polignac number, because 108943681 - 2⁵ = 108943649 is a prime.

It is a super-2 number, since 2×108943681² = 23737451259659522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (108943687) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 101956 + ... + 103018.

It is an arithmetic number, because the mean of its divisors is an integer number (6854288).

Almost surely, 2^108943681 is an apocalyptic number.

108943681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

108943681 is a deficient number, since it is larger than the sum of its proper divisors (28142079).

108943681 is an frugal number, since it uses more digits than its factorization.

108943681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 108943681 is about 10437.6089694910. The cubic root of 108943681 is about 477.6033324426.

It can be divided in two parts, 1089 and 43681, that multiplied together give a square (47568609 = 6897²).

The spelling of 108943681 in words is "one hundred eight million, nine hundred forty-three thousand, six hundred eighty-one".