199099 has 4 divisors (see below), whose sum is σ = 201136. Its totient is φ = 197064.

The previous prime is 199081. The next prime is 199103. The reversal of 199099 is 990991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990991 = 443 ⋅2237.

It is a cyclic number.

It is not a de Polignac number, because 199099 - 2⁷ = 198971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199039) 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, 864 + ... + 1069.

It is an arithmetic number, because the mean of its divisors is an integer number (50284).

2¹⁹⁹⁰⁹⁹ is an apocalyptic number.

199099 is a deficient number, since it is larger than the sum of its proper divisors (2037).

199099 is a wasteful number, since it uses less digits than its factorization.

199099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036.

The product of its (nonzero) digits is 6561, while the sum is 37.

The square root of 199099 is about 446.2051097870. The cubic root of 199099 is about 58.3924045604.

The spelling of 199099 in words is "one hundred ninety-nine thousand, ninety-nine".