27723 has 4 divisors (see below), whose sum is σ = 36968. Its totient is φ = 18480.

The previous prime is 27701. The next prime is 27733. The reversal of 27723 is 32772.

27723 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 27723 - 2⁵ = 27691 is a prime.

It is a D-number.

It is the 167-th Hogben number.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 27723.

It is not an unprimeable number, because it can be changed into a prime (27733) by changing a digit.

It is a nontrivial repunit in base 166.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4618 + ... + 4623.

It is an arithmetic number, because the mean of its divisors is an integer number (9242).

2²⁷⁷²³ is an apocalyptic number.

27723 is a deficient number, since it is larger than the sum of its proper divisors (9245).

27723 is an equidigital number, since it uses as much as digits as its factorization.

27723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9244.

The product of its digits is 588, while the sum is 21.

The square root of 27723 is about 166.5022522370. The cubic root of 27723 is about 30.2654225480.

It can be divided in two parts, 2772 and 3, that added together give a triangular number (2775 = T₇₄).

The spelling of 27723 in words is "twenty-seven thousand, seven hundred twenty-three", and thus it is an iban number.