8243563 has 4 divisors (see below), whose sum is σ = 8466400. Its totient is φ = 8020728.

The previous prime is 8243537. The next prime is 8243579. The reversal of 8243563 is 3653428.

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 8243563 - 2⁵ = 8243531 is a prime.

It is a Duffinian number.

8243563 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8243513) 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, 111363 + ... + 111436.

It is an arithmetic number, because the mean of its divisors is an integer number (2116600).

Almost surely, 2^8243563 is an apocalyptic number.

8243563 is a deficient number, since it is larger than the sum of its proper divisors (222837).

8243563 is a wasteful number, since it uses less digits than its factorization.

8243563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222836.

The product of its digits is 17280, while the sum is 31.

The square root of 8243563 is about 2871.1605667395. The cubic root of 8243563 is about 202.0094349088.

The spelling of 8243563 in words is "eight million, two hundred forty-three thousand, five hundred sixty-three".