209039 has 2 divisors, whose sum is σ = 209040. Its totient is φ = 209038.

The previous prime is 209029. The next prime is 209063. The reversal of 209039 is 930902.

209039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 209039 - 2¹⁶ = 143503 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104519 + 104520.

It is an arithmetic number, because the mean of its divisors is an integer number (104520).

2²⁰⁹⁰³⁹ is an apocalyptic number.

209039 is a deficient number, since it is larger than the sum of its proper divisors (1).

209039 is an equidigital number, since it uses as much as digits as its factorization.

209039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 209039 is about 457.2078302042. The cubic root of 209039 is about 59.3484124729.

The spelling of 209039 in words is "two hundred nine thousand, thirty-nine".