135563 has 4 divisors (see below), whose sum is σ = 139968. Its totient is φ = 131160.

The previous prime is 135559. The next prime is 135571. The reversal of 135563 is 365531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135563 - 2² = 135559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2156 + ... + 2217.

It is an arithmetic number, because the mean of its divisors is an integer number (34992).

2¹³⁵⁵⁶³ is an apocalyptic number.

135563 is a deficient number, since it is larger than the sum of its proper divisors (4405).

135563 is an equidigital number, since it uses as much as digits as its factorization.

135563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404.

The product of its digits is 1350, while the sum is 23.

The square root of 135563 is about 368.1888102591. The cubic root of 135563 is about 51.3704918266.

The spelling of 135563 in words is "one hundred thirty-five thousand, five hundred sixty-three".