5639539 has 4 divisors (see below), whose sum is σ = 5647320. Its totient is φ = 5631760.

The previous prime is 5639533. The next prime is 5639549. The reversal of 5639539 is 9359365.

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 5639539 - 2⁵ = 5639507 is a prime.

It is a Smith number, since the sum of its digits (40) 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 (5639533) 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, 2677 + ... + 4294.

It is an arithmetic number, because the mean of its divisors is an integer number (1411830).

Almost surely, 2^5639539 is an apocalyptic number.

5639539 is a deficient number, since it is larger than the sum of its proper divisors (7781).

5639539 is an equidigital number, since it uses as much as digits as its factorization.

5639539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780.

The product of its digits is 109350, while the sum is 40.

The square root of 5639539 is about 2374.7713574153. The cubic root of 5639539 is about 177.9977590931.

The spelling of 5639539 in words is "five million, six hundred thirty-nine thousand, five hundred thirty-nine".