509243503 has 2 divisors, whose sum is σ = 509243504. Its totient is φ = 509243502.

The previous prime is 509243461. The next prime is 509243507. The reversal of 509243503 is 305342905.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509243503 is a prime.

It is a super-2 number, since 2×509243503² = 518657890695422018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509243507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254621751 + 254621752.

It is an arithmetic number, because the mean of its divisors is an integer number (254621752).

Almost surely, 2^509243503 is an apocalyptic number.

509243503 is a deficient number, since it is larger than the sum of its proper divisors (1).

509243503 is an equidigital number, since it uses as much as digits as its factorization.

509243503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 509243503 is about 22566.4242404507. The cubic root of 509243503 is about 798.5617402900.

The spelling of 509243503 in words is "five hundred nine million, two hundred forty-three thousand, five hundred three".