198199 has 4 divisors (see below), whose sum is σ = 202464. Its totient is φ = 193936.

The previous prime is 198197. The next prime is 198221. The reversal of 198199 is 991891.

198199 = T₁₂ + T₁₃ + ... + T₁₀₅.

198199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991891 = 709 ⋅1399.

It is a cyclic number.

It is not a de Polignac number, because 198199 - 2¹ = 198197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198193) 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, 2062 + ... + 2155.

It is an arithmetic number, because the mean of its divisors is an integer number (50616).

2¹⁹⁸¹⁹⁹ is an apocalyptic number.

198199 is the 364-th centered triangular number.

198199 is a deficient number, since it is larger than the sum of its proper divisors (4265).

198199 is an equidigital number, since it uses as much as digits as its factorization.

198199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264.

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

The square root of 198199 is about 445.1954626903. The cubic root of 198199 is about 58.3042866726.

It can be divided in two parts, 1981 and 99, that added together give a triangular number (2080 = T₆₄).

The spelling of 198199 in words is "one hundred ninety-eight thousand, one hundred ninety-nine".