13808563 has 4 divisors (see below), whose sum is σ = 13816528. Its totient is φ = 13800600.

The previous prime is 13808551. The next prime is 13808593. The reversal of 13808563 is 36580831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13808563 - 2¹⁷ = 13677491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13808503) 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, 156 + ... + 5257.

It is an arithmetic number, because the mean of its divisors is an integer number (3454132).

Almost surely, 2^13808563 is an apocalyptic number.

13808563 is a deficient number, since it is larger than the sum of its proper divisors (7965).

13808563 is an equidigital number, since it uses as much as digits as its factorization.

13808563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7964.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 13808563 is about 3715.9874865236. The cubic root of 13808563 is about 239.9106322359.

The spelling of 13808563 in words is "thirteen million, eight hundred eight thousand, five hundred sixty-three".