523823 has 4 divisors (see below), whose sum is σ = 526680. Its totient is φ = 520968.

The previous prime is 523801. The next prime is 523829. The reversal of 523823 is 328325.

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 523823 - 2⁶ = 523759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 523823.

It is not an unprimeable number, because it can be changed into a prime (523829) 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, 1133 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (131670).

2⁵²³⁸²³ is an apocalyptic number.

523823 is a deficient number, since it is larger than the sum of its proper divisors (2857).

523823 is a wasteful number, since it uses less digits than its factorization.

523823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856.

The product of its digits is 1440, while the sum is 23.

The square root of 523823 is about 723.7561744124. The cubic root of 523823 is about 80.6111013039.

The spelling of 523823 in words is "five hundred twenty-three thousand, eight hundred twenty-three".