239539 has 2 divisors, whose sum is σ = 239540. Its totient is φ = 239538.

The previous prime is 239531. The next prime is 239543. The reversal of 239539 is 935932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239539 - 2³ = 239531 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2⁷ + 3¹⁰ + 5⁵ + 9 + 3¹¹ + 9² .

239539 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 239539.

It is not a weakly prime, because it can be changed into another prime (239531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119769 + 119770.

It is an arithmetic number, because the mean of its divisors is an integer number (119770).

2²³⁹⁵³⁹ is an apocalyptic number.

239539 is a deficient number, since it is larger than the sum of its proper divisors (1).

239539 is an equidigital number, since it uses as much as digits as its factorization.

239539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 31.

The square root of 239539 is about 489.4272162436. The cubic root of 239539 is about 62.1048347768.

It can be divided in two parts, 239 and 539, that multiplied together give a palindrome (128821).

The spelling of 239539 in words is "two hundred thirty-nine thousand, five hundred thirty-nine".