503145663 has 4 divisors (see below), whose sum is σ = 670860888. Its totient is φ = 335430440.

The previous prime is 503145641. The next prime is 503145691. The reversal of 503145663 is 366541305.

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 503145663 - 2¹⁰ = 503144639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503145613) 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, 83857608 + ... + 83857613.

It is an arithmetic number, because the mean of its divisors is an integer number (167715222).

Almost surely, 2^503145663 is an apocalyptic number.

503145663 is a deficient number, since it is larger than the sum of its proper divisors (167715225).

503145663 is a wasteful number, since it uses less digits than its factorization.

503145663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167715224.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 503145663 is about 22430.9086530172. The cubic root of 503145663 is about 795.3615237976.

Adding to 503145663 its reverse (366541305), we get a palindrome (869686968).

The spelling of 503145663 in words is "five hundred three million, one hundred forty-five thousand, six hundred sixty-three".