206099 has 4 divisors (see below), whose sum is σ = 210936. Its totient is φ = 201264.

The previous prime is 206083. The next prime is 206123. The reversal of 206099 is 990602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990602 = 2 ⋅495301.

It is a cyclic number.

It is not a de Polignac number, because 206099 - 2⁴ = 206083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206009) 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, 2354 + ... + 2439.

It is an arithmetic number, because the mean of its divisors is an integer number (52734).

2²⁰⁶⁰⁹⁹ is an apocalyptic number.

206099 is a deficient number, since it is larger than the sum of its proper divisors (4837).

206099 is an equidigital number, since it uses as much as digits as its factorization.

206099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 206099 is about 453.9812771470. The cubic root of 206099 is about 59.0688652938.

The spelling of 206099 in words is "two hundred six thousand, ninety-nine".