199189 has 4 divisors (see below), whose sum is σ = 210924. Its totient is φ = 187456.

The previous prime is 199181. The next prime is 199193. The reversal of 199189 is 981991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58564 + 140625 = 242^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 199189 - 2³ = 199181 is a prime.

It is a Duffinian number.

199189 is a lucky number.

It is a nialpdrome in base 9 and base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5842 + ... + 5875.

It is an arithmetic number, because the mean of its divisors is an integer number (52731).

2¹⁹⁹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

199189 is a deficient number, since it is larger than the sum of its proper divisors (11735).

199189 is a wasteful number, since it uses less digits than its factorization.

199189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11734.

The product of its digits is 5832, while the sum is 37.

The square root of 199189 is about 446.3059488736. The cubic root of 199189 is about 58.4012017329.

It can be divided in two parts, 1991 and 89, that added together give a triangular number (2080 = T₆₄).

The spelling of 199189 in words is "one hundred ninety-nine thousand, one hundred eighty-nine".