506003 has 4 divisors (see below), whose sum is σ = 510840. Its totient is φ = 501168.

The previous prime is 505979. The next prime is 506047. The reversal of 506003 is 300605.

It is a happy number.

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-506003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506083) 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, 2258 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (127710).

2⁵⁰⁶⁰⁰³ is an apocalyptic number.

506003 is a deficient number, since it is larger than the sum of its proper divisors (4837).

506003 is a wasteful number, since it uses less digits than its factorization.

506003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4836.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 506003 is about 711.3388784539. The cubic root of 506003 is about 79.6864287694.

Adding to 506003 its reverse (300605), we get a palindrome (806608).

The spelling of 506003 in words is "five hundred six thousand, three".