11686 has 4 divisors (see below), whose sum is σ = 17532. Its totient is φ = 5842.

The previous prime is 11681. The next prime is 11689. The reversal of 11686 is 68611.

11686 = T₃₈ + T₃₉ + ... + T₄₉.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 5 and base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11681) by changing a digit.

11686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2920 + ... + 2923.

It is an arithmetic number, because the mean of its divisors is an integer number (4383).

2¹¹⁶⁸⁶ is an apocalyptic number.

11686 is a deficient number, since it is larger than the sum of its proper divisors (5846).

11686 is an equidigital number, since it uses as much as digits as its factorization.

11686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5845.

The product of its digits is 288, while the sum is 22.

The square root of 11686 is about 108.1018038702. The cubic root of 11686 is about 22.6928283088.

Subtracting from 11686 its sum of digits (22), we obtain a square (11664 = 108²).

It can be divided in two parts, 116 and 86, that added together give a palindrome (202).

The spelling of 11686 in words is "eleven thousand, six hundred eighty-six".