5623 has 2 divisors, whose sum is σ = 5624.
Its totient is φ = 5622.
The previous prime is 5591. The next prime is 5639. The reversal of 5623 is 3265.
It is an a-pointer prime, because the next prime (5639) can be obtained adding 5623 to its sum of digits (16).
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 5623 - 25 = 5591 is a prime.
It is a super-3 number, since 3×56233 = 533366218101, which contains 333 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 5597 and 5606.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (5653) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2811 + 2812.
It is an arithmetic number, because the mean of its divisors is an integer number (2812).
25623 is an apocalyptic number.
5623 is a deficient number, since it is larger than the sum of its proper divisors (1).
5623 is an equidigital number, since it uses as much as digits as its factorization.
5623 is an evil number, because the sum of its binary digits is even.
The product of its digits is 180, while the sum is 16.
The square root of 5623 is about 74.9866654813.
The cubic root of 5623 is about 17.7823584840.
Adding to 5623 its reverse (3265), we get a palindrome (8888).
It can be divided in two parts, 562 and 3, that added together give a palindrome (565).
The spelling of 5623 in words is "five thousand, six hundred twenty-three".