201986 has 8 divisors (see below), whose sum is σ = 316224. Its totient is φ = 96580.

The previous prime is 201979. The next prime is 201997. The reversal of 201986 is 689102.

201986 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

201986 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 in 3 ways as a sum of consecutive naturals, for example, 2150 + ... + 2241.

It is an arithmetic number, because the mean of its divisors is an integer number (39528).

2²⁰¹⁹⁸⁶ is an apocalyptic number.

201986 is a deficient number, since it is larger than the sum of its proper divisors (114238).

201986 is a wasteful number, since it uses less digits than its factorization.

201986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 201986 is about 449.4285260194. The cubic root of 201986 is about 58.6732875333.

The spelling of 201986 in words is "two hundred one thousand, nine hundred eighty-six".