503985217 has 2 divisors, whose sum is σ = 503985218. Its totient is φ = 503985216.

The previous prime is 503985169. The next prime is 503985271. The reversal of 503985217 is 712589305.

Together with next prime (503985271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498584241 + 5400976 = 22329^2 + 2324^2 .

It is a cyclic number.

It is not a de Polignac number, because 503985217 - 2¹¹ = 503983169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 503985217.

It is not a weakly prime, because it can be changed into another prime (503988217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251992608 + 251992609.

It is an arithmetic number, because the mean of its divisors is an integer number (251992609).

Almost surely, 2^503985217 is an apocalyptic number.

It is an amenable number.

503985217 is a deficient number, since it is larger than the sum of its proper divisors (1).

503985217 is an equidigital number, since it uses as much as digits as its factorization.

503985217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 503985217 is about 22449.6150746511. The cubic root of 503985217 is about 795.8036607621.

The spelling of 503985217 in words is "five hundred three million, nine hundred eighty-five thousand, two hundred seventeen".