108981681 has 8 divisors (see below), whose sum is σ = 150319680. Its totient is φ = 70149072.

The previous prime is 108981629. The next prime is 108981703. The reversal of 108981681 is 186189801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 108981681 - 2¹⁵ = 108948913 is a prime.

It is a super-2 number, since 2×108981681² = 23754013587171522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (108981181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626245 + ... + 626418.

It is an arithmetic number, because the mean of its divisors is an integer number (18789960).

Almost surely, 2^108981681 is an apocalyptic number.

It is an amenable number.

108981681 is a deficient number, since it is larger than the sum of its proper divisors (41337999).

108981681 is a wasteful number, since it uses less digits than its factorization.

108981681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252695.

The product of its (nonzero) digits is 27648, while the sum is 42.

The square root of 108981681 is about 10439.4291510599. The cubic root of 108981681 is about 477.6588559839.

The spelling of 108981681 in words is "one hundred eight million, nine hundred eighty-one thousand, six hundred eighty-one".