503259509 has 2 divisors, whose sum is σ = 503259510. Its totient is φ = 503259508.

The previous prime is 503259371. The next prime is 503259511. The reversal of 503259509 is 905952305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 457318225 + 45941284 = 21385^2 + 6778^2 .

It is a cyclic number.

It is not a de Polignac number, because 503259509 - 2¹⁶ = 503193973 is a prime.

Together with 503259511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503259209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251629754 + 251629755.

It is an arithmetic number, because the mean of its divisors is an integer number (251629755).

Almost surely, 2^503259509 is an apocalyptic number.

It is an amenable number.

503259509 is a deficient number, since it is larger than the sum of its proper divisors (1).

503259509 is an equidigital number, since it uses as much as digits as its factorization.

503259509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60750, while the sum is 38.

The square root of 503259509 is about 22433.4462131880. The cubic root of 503259509 is about 795.4215076857.

The spelling of 503259509 in words is "five hundred three million, two hundred fifty-nine thousand, five hundred nine".