500013903 has 4 divisors (see below), whose sum is σ = 666685208. Its totient is φ = 333342600.

The previous prime is 500013881. The next prime is 500013923. The reversal of 500013903 is 309310005.

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

It is a de Polignac number, because none of the positive numbers 2^k-500013903 is a prime.

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 500013903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500013923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83335648 + ... + 83335653.

It is an arithmetic number, because the mean of its divisors is an integer number (166671302).

Almost surely, 2^500013903 is an apocalyptic number.

500013903 is a deficient number, since it is larger than the sum of its proper divisors (166671305).

500013903 is a wasteful number, since it uses less digits than its factorization.

500013903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166671304.

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 500013903 is about 22360.9906533678. The cubic root of 500013903 is about 793.7078824615.

Adding to 500013903 its reverse (309310005), we get a palindrome (809323908).

The spelling of 500013903 in words is "five hundred million, thirteen thousand, nine hundred three".