5565639 has 8 divisors (see below), whose sum is σ = 7432560. Its totient is φ = 3704576.

The previous prime is 5565611. The next prime is 5565641. The reversal of 5565639 is 9365655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5565639 - 2⁵ = 5565607 is a prime.

5565639 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 5565597 and 5565606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5565139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1789 + ... + 3785.

It is an arithmetic number, because the mean of its divisors is an integer number (929070).

Almost surely, 2^5565639 is an apocalyptic number.

5565639 is a deficient number, since it is larger than the sum of its proper divisors (1866921).

5565639 is a wasteful number, since it uses less digits than its factorization.

5565639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929.

The product of its digits is 121500, while the sum is 39.

The square root of 5565639 is about 2359.1606558266. The cubic root of 5565639 is about 177.2168493542.

The spelling of 5565639 in words is "five million, five hundred sixty-five thousand, six hundred thirty-nine".