503663 has 2 divisors, whose sum is σ = 503664. Its totient is φ = 503662.

The previous prime is 503653. The next prime is 503707. The reversal of 503663 is 366305.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 503663 - 2⁴ = 503647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251831 + 251832.

It is an arithmetic number, because the mean of its divisors is an integer number (251832).

2⁵⁰³⁶⁶³ is an apocalyptic number.

503663 is a deficient number, since it is larger than the sum of its proper divisors (1).

503663 is an equidigital number, since it uses as much as digits as its factorization.

503663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 503663 is about 709.6921867965. The cubic root of 503663 is about 79.5634028714.

Adding to 503663 its reverse (366305), we get a palindrome (869968).

The spelling of 503663 in words is "five hundred three thousand, six hundred sixty-three".