13503563 has 2 divisors, whose sum is σ = 13503564. Its totient is φ = 13503562.

The previous prime is 13503541. The next prime is 13503577. The reversal of 13503563 is 36530531.

It is a strong prime.

It is an emirp because it is prime and its reverse (36530531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13503563 - 2²⁰ = 12454987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13503533) 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 as a sum of consecutive naturals, namely, 6751781 + 6751782.

It is an arithmetic number, because the mean of its divisors is an integer number (6751782).

Almost surely, 2^13503563 is an apocalyptic number.

13503563 is a deficient number, since it is larger than the sum of its proper divisors (1).

13503563 is an equidigital number, since it uses as much as digits as its factorization.

13503563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 26.

The square root of 13503563 is about 3674.7194450733. The cubic root of 13503563 is about 238.1311037672.

It can be divided in two parts, 1350 and 3563, that added together give a cube (4913 = 17³).

The spelling of 13503563 in words is "thirteen million, five hundred three thousand, five hundred sixty-three".