209339 has 4 divisors (see below), whose sum is σ = 225456. Its totient is φ = 193224.

The previous prime is 209333. The next prime is 209347. The reversal of 209339 is 933902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933902 = 2 ⋅466951.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209333) 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, 8039 + ... + 8064.

It is an arithmetic number, because the mean of its divisors is an integer number (56364).

2²⁰⁹³³⁹ is an apocalyptic number.

209339 is a deficient number, since it is larger than the sum of its proper divisors (16117).

209339 is a wasteful number, since it uses less digits than its factorization.

209339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16116.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 209339 is about 457.5357909497. The cubic root of 209339 is about 59.3767899737.

The spelling of 209339 in words is "two hundred nine thousand, three hundred thirty-nine".