206239 has 4 divisors (see below), whose sum is σ = 225000. Its totient is φ = 187480.

The previous prime is 206237. The next prime is 206249. The reversal of 206239 is 932602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206239 - 2¹ = 206237 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 (206233) 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, 9364 + ... + 9385.

It is an arithmetic number, because the mean of its divisors is an integer number (56250).

2²⁰⁶²³⁹ is an apocalyptic number.

206239 is a deficient number, since it is larger than the sum of its proper divisors (18761).

206239 is a wasteful number, since it uses less digits than its factorization.

206239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18760.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 206239 is about 454.1354423517. The cubic root of 206239 is about 59.0822371351.

The spelling of 206239 in words is "two hundred six thousand, two hundred thirty-nine".