630903 has 16 divisors (see below), whose sum is σ = 1035776. Its totient is φ = 332640.

The previous prime is 630901. The next prime is 630907. The reversal of 630903 is 309036.

630903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 630903 - 2¹ = 630901 is a prime.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is a self number, because there is not a number n which added to its sum of digits gives 630903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 883 + ... + 1428.

It is an arithmetic number, because the mean of its divisors is an integer number (64736).

2⁶³⁰⁹⁰³ is an apocalyptic number.

630903 is a deficient number, since it is larger than the sum of its proper divisors (404873).

630903 is a wasteful number, since it uses less digits than its factorization.

630903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334.

The product of its (nonzero) digits is 486, while the sum is 21.

The square root of 630903 is about 794.2940261641. The cubic root of 630903 is about 85.7671273378.

Adding to 630903 its reverse (309036), we get a palindrome (939939).

The spelling of 630903 in words is "six hundred thirty thousand, nine hundred three".