13581863 has 2 divisors, whose sum is σ = 13581864. Its totient is φ = 13581862.

The previous prime is 13581857. The next prime is 13581899. The reversal of 13581863 is 36818531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13581863 - 2⁴ = 13581847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13581823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6790931 + 6790932.

It is an arithmetic number, because the mean of its divisors is an integer number (6790932).

Almost surely, 2^13581863 is an apocalyptic number.

13581863 is a deficient number, since it is larger than the sum of its proper divisors (1).

13581863 is an equidigital number, since it uses as much as digits as its factorization.

13581863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 13581863 is about 3685.3579202026. The cubic root of 13581863 is about 238.5904823351.

The spelling of 13581863 in words is "thirteen million, five hundred eighty-one thousand, eight hundred sixty-three".