65563 has 2 divisors, whose sum is σ = 65564.
Its totient is φ = 65562.
The previous prime is 65557. The next prime is 65579. The reversal of 65563 is 36556.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-65563 is a prime.
65563 is a lucky number.
It is not a weakly prime, because it can be changed into another prime (65543) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32781 + 32782.
It is an arithmetic number, because the mean of its divisors is an integer number (32782).
265563 is an apocalyptic number.
65563 is a deficient number, since it is larger than the sum of its proper divisors (1).
65563 is an equidigital number, since it uses as much as digits as its factorization.
65563 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 2700, while the sum is 25.
The square root of 65563 is about 256.0527289446.
The cubic root of 65563 is about 40.3230095989.
The spelling of 65563 in words is "sixty-five thousand, five hundred sixty-three".