500003 has 4 divisors (see below), whose sum is σ = 571440. Its totient is φ = 428568.

The previous prime is 499979. The next prime is 500009. The reversal of 500003 is 300005.

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

It is not a de Polignac number, because 500003 - 2⁸ = 499747 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (500009) 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, 35708 + ... + 35721.

It is an arithmetic number, because the mean of its divisors is an integer number (142860).

2⁵⁰⁰⁰⁰³ is an apocalyptic number.

500003 is a deficient number, since it is larger than the sum of its proper divisors (71437).

500003 is an equidigital number, since it uses as much as digits as its factorization.

500003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71436.

The product of its (nonzero) digits is 15, while the sum is 8.

The square root of 500003 is about 707.1089025037. The cubic root of 500003 is about 79.3702113382.

Adding to 500003 its reverse (300005), we get a palindrome (800008).

The spelling of 500003 in words is "five hundred thousand, three".