523803 has 8 divisors (see below), whose sum is σ = 798208. Its totient is φ = 299304.

The previous prime is 523801. The next prime is 523829. The reversal of 523803 is 308325.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 523803 - 2¹ = 523801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 24943 = 523803 / (5 + 2 + 3 + 8 + 0 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 523803.

It is not an unprimeable number, because it can be changed into a prime (523801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12451 + ... + 12492.

It is an arithmetic number, because the mean of its divisors is an integer number (99776).

2⁵²³⁸⁰³ is an apocalyptic number.

523803 is a deficient number, since it is larger than the sum of its proper divisors (274405).

523803 is a wasteful number, since it uses less digits than its factorization.

523803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24953.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 523803 is about 723.7423574726. The cubic root of 523803 is about 80.6100753577.

It can be divided in two parts, 523 and 803, that added together give a triangular number (1326 = T₅₁).

The spelling of 523803 in words is "five hundred twenty-three thousand, eight hundred three".