13803563 has 4 divisors (see below), whose sum is σ = 13852968. Its totient is φ = 13754160.

The previous prime is 13803547. The next prime is 13803577. The reversal of 13803563 is 36530831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36530831 = 23 ⋅1588297.

It is a cyclic number.

It is not a de Polignac number, because 13803563 - 2⁴ = 13803547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13803583) 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, 24281 + ... + 24842.

It is an arithmetic number, because the mean of its divisors is an integer number (3463242).

Almost surely, 2^13803563 is an apocalyptic number.

13803563 is a deficient number, since it is larger than the sum of its proper divisors (49405).

13803563 is an equidigital number, since it uses as much as digits as its factorization.

13803563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49404.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 13803563 is about 3715.3146569302. The cubic root of 13803563 is about 239.8816719940.

The spelling of 13803563 in words is "thirteen million, eight hundred three thousand, five hundred sixty-three".