503240663 has 4 divisors (see below), whose sum is σ = 516841800. Its totient is φ = 489639528.

The previous prime is 503240659. The next prime is 503240723. The reversal of 503240663 is 366042305.

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 503240663 - 2² = 503240659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503240603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6800513 + ... + 6800586.

It is an arithmetic number, because the mean of its divisors is an integer number (129210450).

Almost surely, 2^503240663 is an apocalyptic number.

503240663 is a deficient number, since it is larger than the sum of its proper divisors (13601137).

503240663 is a wasteful number, since it uses less digits than its factorization.

503240663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13601136.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 503240663 is about 22433.0261667926. The cubic root of 503240663 is about 795.4115786129.

Adding to 503240663 its reverse (366042305), we get a palindrome (869282968).

The spelling of 503240663 in words is "five hundred three million, two hundred forty thousand, six hundred sixty-three".