199771086 has 32 divisors (see below), whose sum is σ = 406798848. Its totient is φ = 65387520.

The previous prime is 199771081. The next prime is 199771093. The reversal of 199771086 is 680177991.

It is a happy number.

199771086 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 not an unprimeable number, because it can be changed into a prime (199771081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172686 + ... + 173838.

It is an arithmetic number, because the mean of its divisors is an integer number (12712464).

Almost surely, 2^199771086 is an apocalyptic number.

199771086 is an abundant number, since it is smaller than the sum of its proper divisors (207027762).

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

199771086 is a wasteful number, since it uses less digits than its factorization.

199771086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its (nonzero) digits is 190512, while the sum is 48.

The square root of 199771086 is about 14134.0399744730. The cubic root of 199771086 is about 584.5803462655.

The spelling of 199771086 in words is "one hundred ninety-nine million, seven hundred seventy-one thousand, eighty-six".