538383509 has 2 divisors, whose sum is σ = 538383510. Its totient is φ = 538383508.

The previous prime is 538383497. The next prime is 538383511. The reversal of 538383509 is 905383835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441420100 + 96963409 = 21010^2 + 9847^2 .

It is a cyclic number.

It is not a de Polignac number, because 538383509 - 2⁴ = 538383493 is a prime.

It is a Sophie Germain prime.

Together with 538383511, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 538383509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538383529) 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, 269191754 + 269191755.

It is an arithmetic number, because the mean of its divisors is an integer number (269191755).

Almost surely, 2^538383509 is an apocalyptic number.

It is an amenable number.

538383509 is a deficient number, since it is larger than the sum of its proper divisors (1).

538383509 is an equidigital number, since it uses as much as digits as its factorization.

538383509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 538383509 is about 23203.0926602468. The cubic root of 538383509 is about 813.5119114098.

The spelling of 538383509 in words is "five hundred thirty-eight million, three hundred eighty-three thousand, five hundred nine".