563509 has 4 divisors (see below), whose sum is σ = 573120. Its totient is φ = 553900.

The previous prime is 563503. The next prime is 563543. The reversal of 563509 is 905365.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 563509 - 2³ = 563501 is a prime.

It is a Duffinian number.

563509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563501) 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, 4717 + ... + 4834.

It is an arithmetic number, because the mean of its divisors is an integer number (143280).

2⁵⁶³⁵⁰⁹ is an apocalyptic number.

563509 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

563509 is a deficient number, since it is larger than the sum of its proper divisors (9611).

563509 is an equidigital number, since it uses as much as digits as its factorization.

563509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9610.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 563509 is about 750.6723652833. The cubic root of 563509 is about 82.5975094372.

The spelling of 563509 in words is "five hundred sixty-three thousand, five hundred nine".