403823 has 4 divisors (see below), whose sum is σ = 461520. Its totient is φ = 346128.

The previous prime is 403817. The next prime is 403829. The reversal of 403823 is 328304.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (403817) and next prime (403829).

It is a cyclic number.

It is not a de Polignac number, because 403823 - 2⁸ = 403567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403795 and 403804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28838 + ... + 28851.

It is an arithmetic number, because the mean of its divisors is an integer number (115380).

2⁴⁰³⁸²³ is an apocalyptic number.

403823 is a deficient number, since it is larger than the sum of its proper divisors (57697).

403823 is an equidigital number, since it uses as much as digits as its factorization.

403823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57696.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 403823 is about 635.4706916924. The cubic root of 403823 is about 73.9146203013.

The spelling of 403823 in words is "four hundred three thousand, eight hundred twenty-three".