493823 has 4 divisors (see below), whose sum is σ = 538728. Its totient is φ = 448920.

The previous prime is 493817. The next prime is 493853. The reversal of 493823 is 328394.

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 493823 - 2⁴ = 493807 is a prime.

It is a super-2 number, since 2×493823² = 487722310658, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

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 493823.

It is not an unprimeable number, because it can be changed into a prime (493813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22436 + ... + 22457.

It is an arithmetic number, because the mean of its divisors is an integer number (134682).

2⁴⁹³⁸²³ is an apocalyptic number.

493823 is a deficient number, since it is larger than the sum of its proper divisors (44905).

493823 is a wasteful number, since it uses less digits than its factorization.

493823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44904.

The product of its digits is 5184, while the sum is 29.

The square root of 493823 is about 702.7254086768. The cubic root of 493823 is about 79.0418514560.

The spelling of 493823 in words is "four hundred ninety-three thousand, eight hundred twenty-three".