5643509 has 2 divisors, whose sum is σ = 5643510. Its totient is φ = 5643508.

The previous prime is 5643503. The next prime is 5643529. The reversal of 5643509 is 9053465.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3598609 + 2044900 = 1897^2 + 1430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5643509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5643503) 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 as a sum of consecutive naturals, namely, 2821754 + 2821755.

It is an arithmetic number, because the mean of its divisors is an integer number (2821755).

Almost surely, 2^5643509 is an apocalyptic number.

It is an amenable number.

5643509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5643509 is an equidigital number, since it uses as much as digits as its factorization.

5643509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 5643509 is about 2375.6070803060. The cubic root of 5643509 is about 178.0395169597.

The spelling of 5643509 in words is "five million, six hundred forty-three thousand, five hundred nine".