191086 has 8 divisors (see below), whose sum is σ = 327600. Its totient is φ = 81888.

The previous prime is 191071. The next prime is 191089. The reversal of 191086 is 680191.

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

It is a self number, because there is not a number n which added to its sum of digits gives 191086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191089) by changing a digit.

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, 6811 + ... + 6838.

It is an arithmetic number, because the mean of its divisors is an integer number (40950).

2¹⁹¹⁰⁸⁶ is an apocalyptic number.

191086 is a deficient number, since it is larger than the sum of its proper divisors (136514).

191086 is a wasteful number, since it uses less digits than its factorization.

191086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13658.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 191086 is about 437.1338467792. The cubic root of 191086 is about 57.5982943811.

The spelling of 191086 in words is "one hundred ninety-one thousand, eighty-six".