5539 has 4 divisors (see below), whose sum is σ = 5760. Its totient is φ = 5320.

The previous prime is 5531. The next prime is 5557. The reversal of 5539 is 9355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9355 = 5 ⋅1871.

It is a cyclic number.

It is not a de Polignac number, because 5539 - 2³ = 5531 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67 + ... + 124.

It is an arithmetic number, because the mean of its divisors is an integer number (1440).

2⁵⁵³⁹ is an apocalyptic number.

5539 is a deficient number, since it is larger than the sum of its proper divisors (221).

5539 is a wasteful number, since it uses less digits than its factorization.

5539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220.

The product of its digits is 675, while the sum is 22.

The square root of 5539 is about 74.4244583454. The cubic root of 5539 is about 17.6933657455.

It can be divided in two parts, 55 and 39, that multiplied together give a triangular number (2145 = T₆₅).

The spelling of 5539 in words is "five thousand, five hundred thirty-nine".