8320563 has 24 divisors (see below), whose sum is σ = 12627888. Its totient is φ = 5474304.

The previous prime is 8320547. The next prime is 8320567. The reversal of 8320563 is 3650238.

8320563 is a `hidden beast` number, since 83 + 20 + 563 = 666.

It is not a de Polignac number, because 8320563 - 2⁴ = 8320547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (8320567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23395 + ... + 23747.

It is an arithmetic number, because the mean of its divisors is an integer number (526162).

Almost surely, 2^8320563 is an apocalyptic number.

8320563 is a deficient number, since it is larger than the sum of its proper divisors (4307325).

8320563 is an equidigital number, since it uses as much as digits as its factorization.

8320563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 8320563 is about 2884.5386112860. The cubic root of 8320563 is about 202.6364512438.

The spelling of 8320563 in words is "eight million, three hundred twenty thousand, five hundred sixty-three".