84239 has 2 divisors, whose sum is σ = 84240. Its totient is φ = 84238.

The previous prime is 84229. The next prime is 84247. The reversal of 84239 is 93248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84239 - 2⁴ = 84223 is a prime.

It is a super-3 number, since 3×84239³ = 1793332680431757, which contains 333 as substring.

It is a Chen prime.

It is a plaindrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42119 + 42120.

It is an arithmetic number, because the mean of its divisors is an integer number (42120).

2⁸⁴²³⁹ is an apocalyptic number.

84239 is a deficient number, since it is larger than the sum of its proper divisors (1).

84239 is an equidigital number, since it uses as much as digits as its factorization.

84239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 84239 is about 290.2395562290. The cubic root of 84239 is about 43.8366879835.

Subtracting 84239 from its reverse (93248), we obtain a palindrome (9009).

It can be divided in two parts, 84 and 239, that added together give a palindrome (323).

The spelling of 84239 in words is "eighty-four thousand, two hundred thirty-nine".