67439 has 4 divisors (see below), whose sum is σ = 71424. Its totient is φ = 63456.

The previous prime is 67433. The next prime is 67447. The reversal of 67439 is 93476.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67439 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 (67433) 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, 1967 + ... + 2000.

It is an arithmetic number, because the mean of its divisors is an integer number (17856).

2⁶⁷⁴³⁹ is an apocalyptic number.

67439 is a deficient number, since it is larger than the sum of its proper divisors (3985).

67439 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 67439 = (46739)₁₁.

67439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984.

The product of its digits is 4536, while the sum is 29.

The square root of 67439 is about 259.6902000461. The cubic root of 67439 is about 40.7039954061.

The spelling of 67439 in words is "sixty-seven thousand, four hundred thirty-nine".