199011 has 4 divisors (see below), whose sum is σ = 265352. Its totient is φ = 132672.

The previous prime is 198997. The next prime is 199021. The reversal of 199011 is 110991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110991 = 3 ⋅36997.

It is not a de Polignac number, because 199011 - 2¹⁴ = 182627 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33166 + ... + 33171.

It is an arithmetic number, because the mean of its divisors is an integer number (66338).

2¹⁹⁹⁰¹¹ is an apocalyptic number.

199011 is a deficient number, since it is larger than the sum of its proper divisors (66341).

199011 is an equidigital number, since it uses as much as digits as its factorization.

199011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66340.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 199011 is about 446.1064895291. The cubic root of 199011 is about 58.3838003169.

The spelling of 199011 in words is "one hundred ninety-nine thousand, eleven".