100686 has 16 divisors (see below), whose sum is σ = 204624. Its totient is φ = 33024.

The previous prime is 100673. The next prime is 100693. The reversal of 100686 is 686001.

It is an Ulam number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (12789).

2¹⁰⁰⁶⁸⁶ is an apocalyptic number.

100686 is an abundant number, since it is smaller than the sum of its proper divisors (103938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100686 is a wasteful number, since it uses less digits than its factorization.

100686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 100686 is about 317.3105734135. The cubic root of 100686 is about 46.5217842201.

Adding to 100686 its reverse (686001), we get a palindrome (786687).

The spelling of 100686 in words is "one hundred thousand, six hundred eighty-six".