199599 has 4 divisors (see below), whose sum is σ = 266136. Its totient is φ = 133064.

The previous prime is 199583. The next prime is 199601. The reversal of 199599 is 995991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 995991 = 3 ⋅331997.

It is a cyclic number.

It is not a de Polignac number, because 199599 - 2⁴ = 199583 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 199599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199559) 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, 33264 + ... + 33269.

It is an arithmetic number, because the mean of its divisors is an integer number (66534).

2¹⁹⁹⁵⁹⁹ is an apocalyptic number.

199599 is a deficient number, since it is larger than the sum of its proper divisors (66537).

199599 is an equidigital number, since it uses as much as digits as its factorization.

199599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66536.

The product of its digits is 32805, while the sum is 42.

The square root of 199599 is about 446.7650389187. The cubic root of 199599 is about 58.4412442433.

The spelling of 199599 in words is "one hundred ninety-nine thousand, five hundred ninety-nine".