630503 has 4 divisors (see below), whose sum is σ = 635448. Its totient is φ = 625560.

The previous prime is 630493. The next prime is 630521. The reversal of 630503 is 305036.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 630503 - 2⁸ = 630247 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276 + ... + 2537.

It is an arithmetic number, because the mean of its divisors is an integer number (158862).

2⁶³⁰⁵⁰³ is an apocalyptic number.

630503 is a deficient number, since it is larger than the sum of its proper divisors (4945).

630503 is a wasteful number, since it uses less digits than its factorization.

630503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 630503 is about 794.0421903148. The cubic root of 630503 is about 85.7489977132.

Adding to 630503 its reverse (305036), we get a palindrome (935539).

The spelling of 630503 in words is "six hundred thirty thousand, five hundred three".