206839 has 8 divisors (see below), whose sum is σ = 228960. Its totient is φ = 186208.

The previous prime is 206827. The next prime is 206879. The reversal of 206839 is 938602.

206839 = 17² + 18² + ... + 85².

It is not a de Polignac number, because 206839 - 2⁵ = 206807 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8982 + ... + 9004.

It is an arithmetic number, because the mean of its divisors is an integer number (28620).

2²⁰⁶⁸³⁹ is an apocalyptic number.

206839 is a deficient number, since it is larger than the sum of its proper divisors (22121).

206839 is an frugal number, since it uses more digits than its factorization.

206839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 206839 is about 454.7955584656. The cubic root of 206839 is about 59.1394765851.

It can be divided in two parts, 20 and 6839, that added together give a cube (6859 = 19³).

The spelling of 206839 in words is "two hundred six thousand, eight hundred thirty-nine".