239543 has 2 divisors, whose sum is σ = 239544. Its totient is φ = 239542.

The previous prime is 239539. The next prime is 239557. The reversal of 239543 is 345932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 239543 - 2² = 239539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119771 + 119772.

It is an arithmetic number, because the mean of its divisors is an integer number (119772).

2²³⁹⁵⁴³ is an apocalyptic number.

239543 is a deficient number, since it is larger than the sum of its proper divisors (1).

239543 is an equidigital number, since it uses as much as digits as its factorization.

239543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 26.

The square root of 239543 is about 489.4313026360. The cubic root of 239543 is about 62.1051804658.

The spelling of 239543 in words is "two hundred thirty-nine thousand, five hundred forty-three".