2009239 has 2 divisors, whose sum is σ = 2009240. Its totient is φ = 2009238.

The previous prime is 2009233. The next prime is 2009243. The reversal of 2009239 is 9329002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2009239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2009233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004619 + 1004620.

It is an arithmetic number, because the mean of its divisors is an integer number (1004620).

2^2009239 is an apocalyptic number.

2009239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009239 is an equidigital number, since it uses as much as digits as its factorization.

2009239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 2009239 is about 1417.4762784611. The cubic root of 2009239 is about 126.1858138586.

The spelling of 2009239 in words is "two million, nine thousand, two hundred thirty-nine".