3439 has 4 divisors (see below), whose sum is σ = 3640.
Its totient is φ = 3240.
The previous prime is 3433. The next prime is 3449. The reversal of 3439 is 9343.
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 3439 - 25 = 3407 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 181 = 3439 / (3 + 4 + 3 + 9).
It is a Duffinian number.
3439 is a lucky number.
It is a plaindrome in base 14.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3433) 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, 72 + ... + 109.
It is an arithmetic number, because the mean of its divisors is an integer number (910).
It is the magic constant of a 19 × 19 magic square.
23439 is an apocalyptic number.
3439 is a deficient number, since it is larger than the sum of its proper divisors (201).
3439 is a wasteful number, since it uses less digits than its factorization.
With its predecessor (3438) it forms an eRAP, since the sums of their prime factors are consecutive (199 and 200).
3439 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 200.
The product of its digits is 324, while the sum is 19.
The square root of 3439 is about 58.6429876456.
The cubic root of 3439 is about 15.0942217267.
Multiplying 3439 by its sum of digits (19), we get a triangular number (65341 = T361).
3439 divided by its sum of digits (19) gives a palindrome (181).
It can be divided in two parts, 34 and 39, that multiplied together give a triangular number (1326 = T51).
The spelling of 3439 in words is "three thousand, four hundred thirty-nine".