2439 has 6 divisors (see below), whose sum is σ = 3536. Its totient is φ = 1620.

The previous prime is 2437. The next prime is 2441. The reversal of 2439 is 9342.

Added to its reverse (9342) it gives a triangular number (11781 = T₁₅₃).

2439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

2439 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (2437) and next prime (2441).

It is not a de Polignac number, because 2439 - 2¹ = 2437 is a prime.

It is a Duffinian number.

2439 is a lucky number.

It is a plaindrome in base 13.

It is a nialpdrome in base 9, base 14 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127 + ... + 144.

2439 is a deficient number, since it is larger than the sum of its proper divisors (1097).

2439 is a wasteful number, since it uses less digits than its factorization.

2439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 274 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2439 is about 49.3862328995. The cubic root of 2439 is about 13.4607915860.

Adding to 2439 its reverse (9342), we get a triangular number (11781 = T₁₅₃).

Subtracting 2439 from its reverse (9342), we obtain a triangular number (6903 = T₁₁₇).

It can be divided in two parts, 243 and 9, that multiplied together give a 7-th power (2187 = 3⁷).

The spelling of 2439 in words is "two thousand, four hundred thirty-nine".