108661 has 12 divisors (see below), whose sum is σ = 134112.
Its totient is φ = 86184.
The previous prime is 108649. The next prime is 108677. The reversal of 108661 is 166801.
It is not a de Polignac number, because 108661 - 27 = 108533 is a prime.
It is a Duffinian number.
108661 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (108631) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2506 + ... + 2548.
It is an arithmetic number, because the mean of its divisors is an integer number (11176).
2108661 is an apocalyptic number.
It is an amenable number.
108661 is a deficient number, since it is larger than the sum of its proper divisors (25451).
108661 is an equidigital number, since it uses as much as digits as its factorization.
108661 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 88 (or 69 counting only the distinct ones).
The product of its (nonzero) digits is 288, while the sum is 22.
The square root of 108661 is about 329.6376798851.
The cubic root of 108661 is about 47.7189888461.
The spelling of 108661 in words is "one hundred eight thousand, six hundred sixty-one".