8001563 has 4 divisors (see below), whose sum is σ = 8043648. Its totient is φ = 7959480.

The previous prime is 8001559. The next prime is 8001571. The reversal of 8001563 is 3651008.

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 8001563 - 2² = 8001559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8001533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20756 + ... + 21137.

It is an arithmetic number, because the mean of its divisors is an integer number (2010912).

Almost surely, 2^8001563 is an apocalyptic number.

8001563 is a deficient number, since it is larger than the sum of its proper divisors (42085).

8001563 is a wasteful number, since it uses less digits than its factorization.

8001563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42084.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 8001563 is about 2828.7034132266. The cubic root of 8001563 is about 200.0130241518.

The spelling of 8001563 in words is "eight million, one thousand, five hundred sixty-three".