273563 has 4 divisors (see below), whose sum is σ = 277488. Its totient is φ = 269640.

The previous prime is 273551. The next prime is 273569. The reversal of 273563 is 365372.

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 273563 - 2¹⁰ = 272539 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (273569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (69372).

2²⁷³⁵⁶³ is an apocalyptic number.

273563 is a deficient number, since it is larger than the sum of its proper divisors (3925).

273563 is an equidigital number, since it uses as much as digits as its factorization.

273563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924.

The product of its digits is 3780, while the sum is 26.

The square root of 273563 is about 523.0325037701. The cubic root of 273563 is about 64.9161047811.

Subtracting 273563 from its reverse (365372), we obtain a square (91809 = 303²).

The spelling of 273563 in words is "two hundred seventy-three thousand, five hundred sixty-three".