4423 has 2 divisors, whose sum is σ = 4424.
Its totient is φ = 4422.
The previous prime is 4421. The next prime is 4441. The reversal of 4423 is 3244.
Adding to 4423 its reverse (3244), we get a palindrome (7667).
It can be divided in two parts, 442 and 3, that multiplied together give a triangular number (1326 = T51).
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 4423 - 21 = 4421 is a prime.
Together with 4421, it forms a pair of twin primes.
It is the 67-th Hogben number.
It is a plaindrome in base 15 and base 16.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (4421) by changing a digit.
It is a nontrivial repunit in base 66.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2211 + 2212.
It is an arithmetic number, because the mean of its divisors is an integer number (2212).
24423 is an apocalyptic number.
4423 is a deficient number, since it is larger than the sum of its proper divisors (1).
4423 is an equidigital number, since it uses as much as digits as its factorization.
4423 is an evil number, because the sum of its binary digits is even.
The product of its digits is 96, while the sum is 13.
The square root of 4423 is about 66.5056388587.
The cubic root of 4423 is about 16.4149279110.
The spelling of 4423 in words is "four thousand, four hundred twenty-three", and thus it is an iban number.