505003 has 4 divisors (see below), whose sum is σ = 506800. Its totient is φ = 503208.

The previous prime is 504991. The next prime is 505027. The reversal of 505003 is 300505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300505 = 5 ⋅60101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505033) 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, 375 + ... + 1072.

It is an arithmetic number, because the mean of its divisors is an integer number (126700).

2⁵⁰⁵⁰⁰³ is an apocalyptic number.

505003 is a deficient number, since it is larger than the sum of its proper divisors (1797).

505003 is a wasteful number, since it uses less digits than its factorization.

505003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 75, while the sum is 13.

The square root of 505003 is about 710.6356309671. The cubic root of 505003 is about 79.6339001082.

Adding to 505003 its reverse (300505), we get a palindrome (805508).

The spelling of 505003 in words is "five hundred five thousand, three".