189686 has 16 divisors (see below), whose sum is σ = 344736. Its totient is φ = 76416.

The previous prime is 189671. The next prime is 189691. The reversal of 189686 is 686981.

189686 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 189686.

It is an unprimeable number.

189686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161 + ... + 636.

It is an arithmetic number, because the mean of its divisors is an integer number (21546).

2¹⁸⁹⁶⁸⁶ is an apocalyptic number.

189686 is a deficient number, since it is larger than the sum of its proper divisors (155050).

189686 is a wasteful number, since it uses less digits than its factorization.

189686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823.

The product of its digits is 20736, while the sum is 38.

The square root of 189686 is about 435.5295627165. The cubic root of 189686 is about 57.4572839646.

The spelling of 189686 in words is "one hundred eighty-nine thousand, six hundred eighty-six".