13539563 has 2 divisors, whose sum is σ = 13539564. Its totient is φ = 13539562.

The previous prime is 13539557. The next prime is 13539583. The reversal of 13539563 is 36593531.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13539563 is a prime.

It is not a weakly prime, because it can be changed into another prime (13539583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6769781 + 6769782.

It is an arithmetic number, because the mean of its divisors is an integer number (6769782).

Almost surely, 2^13539563 is an apocalyptic number.

13539563 is a deficient number, since it is larger than the sum of its proper divisors (1).

13539563 is an equidigital number, since it uses as much as digits as its factorization.

13539563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36450, while the sum is 35.

The square root of 13539563 is about 3679.6145178537. The cubic root of 13539563 is about 238.3425322328.

The spelling of 13539563 in words is "thirteen million, five hundred thirty-nine thousand, five hundred sixty-three".