523003 has 4 divisors (see below), whose sum is σ = 563248. Its totient is φ = 482760.

The previous prime is 522989. The next prime is 523007. The reversal of 523003 is 300325.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 40231 = 523003 / (5 + 2 + 3 + 0 + 0 + 3).

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (523007) 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, 20103 + ... + 20128.

It is an arithmetic number, because the mean of its divisors is an integer number (140812).

2⁵²³⁰⁰³ is an apocalyptic number.

523003 is a deficient number, since it is larger than the sum of its proper divisors (40245).

523003 is a wasteful number, since it uses less digits than its factorization.

523003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40244.

The product of its (nonzero) digits is 90, while the sum is 13.

The square root of 523003 is about 723.1894634188. The cubic root of 523003 is about 80.5690160798.

Adding to 523003 its reverse (300325), we get a palindrome (823328).

The spelling of 523003 in words is "five hundred twenty-three thousand, three".