Subtracting 13686 from its reverse (68631), we obtain a palindrome (54945).
It is a sphenic number, since it is the product of 3 distinct primes.
13686 is an admirable number.
It is a congruent number.
13686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
213686 is an apocalyptic number.
13686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13686 is a wasteful number, since it uses less digits than its factorization.
13686 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2286.
The square root of 13686 is about 116.9871787847. The cubic root of 13686 is about 23.9198716637.
The spelling of 13686 in words is "thirteen thousand, six hundred eighty-six".