13613563 has 2 divisors, whose sum is σ = 13613564. Its totient is φ = 13613562.

The previous prime is 13613533. The next prime is 13613569. The reversal of 13613563 is 36531631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13613563 - 2⁵ = 13613531 is a prime.

It is a super-3 number, since 3×13613563³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (13613569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6806781 + 6806782.

It is an arithmetic number, because the mean of its divisors is an integer number (6806782).

Almost surely, 2^13613563 is an apocalyptic number.

13613563 is a deficient number, since it is larger than the sum of its proper divisors (1).

13613563 is an equidigital number, since it uses as much as digits as its factorization.

13613563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 28.

The square root of 13613563 is about 3689.6562170479. The cubic root of 13613563 is about 238.7759611034.

The spelling of 13613563 in words is "thirteen million, six hundred thirteen thousand, five hundred sixty-three".