623823 has 4 divisors (see below), whose sum is σ = 831768. Its totient is φ = 415880.

The previous prime is 623803. The next prime is 623839. The reversal of 623823 is 328326.

623823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 623823 - 2⁶ = 623759 is a prime.

It is a D-number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 623793 and 623802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623803) 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, 103968 + ... + 103973.

It is an arithmetic number, because the mean of its divisors is an integer number (207942).

2⁶²³⁸²³ is an apocalyptic number.

623823 is a deficient number, since it is larger than the sum of its proper divisors (207945).

623823 is a wasteful number, since it uses less digits than its factorization.

623823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207944.

The product of its digits is 1728, while the sum is 24.

The square root of 623823 is about 789.8246640869. The cubic root of 623823 is about 85.4450931628.

The spelling of 623823 in words is "six hundred twenty-three thousand, eight hundred twenty-three".