82439 has 4 divisors (see below), whose sum is σ = 94224. Its totient is φ = 70656.

The previous prime is 82421. The next prime is 82457. The reversal of 82439 is 93428.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (82421) and next prime (82457).

It is a cyclic number.

It is not a de Polignac number, because 82439 - 2⁸ = 82183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82469) 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, 5882 + ... + 5895.

It is an arithmetic number, because the mean of its divisors is an integer number (23556).

2⁸²⁴³⁹ is an apocalyptic number.

82439 is a deficient number, since it is larger than the sum of its proper divisors (11785).

82439 is a wasteful number, since it uses less digits than its factorization.

82439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11784.

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

The square root of 82439 is about 287.1219253209. The cubic root of 82439 is about 43.5222064801.

The spelling of 82439 in words is "eighty-two thousand, four hundred thirty-nine".