27523 has 4 divisors (see below), whose sum is σ = 29160. Its totient is φ = 25888.

The previous prime is 27509. The next prime is 27527. The reversal of 27523 is 32572.

It is a happy number.

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 27523 - 2⁹ = 27011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27523.

It is not an unprimeable number, because it can be changed into a prime (27527) 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, 793 + ... + 826.

It is an arithmetic number, because the mean of its divisors is an integer number (7290).

2²⁷⁵²³ is an apocalyptic number.

27523 is a deficient number, since it is larger than the sum of its proper divisors (1637).

27523 is a wasteful number, since it uses less digits than its factorization.

27523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636.

The product of its digits is 420, while the sum is 19.

The square root of 27523 is about 165.9005726331. The cubic root of 27523 is about 30.1924662874.

It can be divided in two parts, 2752 and 3, that multiplied together give a triangular number (8256 = T₁₂₈).

The spelling of 27523 in words is "twenty-seven thousand, five hundred twenty-three".