239009 has 4 divisors (see below), whose sum is σ = 243120. Its totient is φ = 234900.

The previous prime is 238991. The next prime is 239017. The reversal of 239009 is 900932.

239009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 239009 - 2¹⁶ = 173473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239069) 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, 1967 + ... + 2084.

It is an arithmetic number, because the mean of its divisors is an integer number (60780).

2²³⁹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

239009 is a deficient number, since it is larger than the sum of its proper divisors (4111).

239009 is an equidigital number, since it uses as much as digits as its factorization.

239009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110.

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

The square root of 239009 is about 488.8854671597. The cubic root of 239009 is about 62.0589969126.

The spelling of 239009 in words is "two hundred thirty-nine thousand, nine".