67839 has 4 divisors (see below), whose sum is σ = 90456. Its totient is φ = 45224.

The previous prime is 67829. The next prime is 67843. The reversal of 67839 is 93876.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 67839 - 2⁵ = 67807 is a prime.

It is a D-number.

67839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67819) 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, 11304 + ... + 11309.

It is an arithmetic number, because the mean of its divisors is an integer number (22614).

2⁶⁷⁸³⁹ is an apocalyptic number.

67839 is a deficient number, since it is larger than the sum of its proper divisors (22617).

67839 is a wasteful number, since it uses less digits than its factorization.

67839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22616.

The product of its digits is 9072, while the sum is 33.

The square root of 67839 is about 260.4592098583. The cubic root of 67839 is about 40.7843125003.

It can be divided in two parts, 678 and 39, that added together give a palindrome (717).

The spelling of 67839 in words is "sixty-seven thousand, eight hundred thirty-nine".