83686 has 4 divisors (see below), whose sum is σ = 125532. Its totient is φ = 41842.

The previous prime is 83663. The next prime is 83689. The reversal of 83686 is 68638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68638 = 2 ⋅34319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20920 + ... + 20923.

It is an arithmetic number, because the mean of its divisors is an integer number (31383).

2⁸³⁶⁸⁶ is an apocalyptic number.

83686 is a deficient number, since it is larger than the sum of its proper divisors (41846).

83686 is a wasteful number, since it uses less digits than its factorization.

83686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41845.

The product of its digits is 6912, while the sum is 31.

The square root of 83686 is about 289.2853262784. The cubic root of 83686 is about 43.7405530623.

The spelling of 83686 in words is "eighty-three thousand, six hundred eighty-six".