195986 has 8 divisors (see below), whose sum is σ = 336000. Its totient is φ = 83988.

The previous prime is 195977. The next prime is 195991. The reversal of 195986 is 689591.

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

It is a congruent number.

It is an unprimeable number.

195986 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 3 ways as a sum of consecutive naturals, for example, 6986 + ... + 7013.

It is an arithmetic number, because the mean of its divisors is an integer number (42000).

2¹⁹⁵⁹⁸⁶ is an apocalyptic number.

195986 is a deficient number, since it is larger than the sum of its proper divisors (140014).

195986 is a wasteful number, since it uses less digits than its factorization.

195986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14008.

The product of its digits is 19440, while the sum is 38.

The square root of 195986 is about 442.7030607529. The cubic root of 195986 is about 58.0864742585.

The spelling of 195986 in words is "one hundred ninety-five thousand, nine hundred eighty-six".