530157809 has 2 divisors, whose sum is σ = 530157810. Its totient is φ = 530157808.

The previous prime is 530157773. The next prime is 530157811. The reversal of 530157809 is 908751035.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310288225 + 219869584 = 17615^2 + 14828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-530157809 is a prime.

Together with 530157811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (530157899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265078904 + 265078905.

It is an arithmetic number, because the mean of its divisors is an integer number (265078905).

Almost surely, 2^530157809 is an apocalyptic number.

It is an amenable number.

530157809 is a deficient number, since it is larger than the sum of its proper divisors (1).

530157809 is an equidigital number, since it uses as much as digits as its factorization.

530157809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 530157809 is about 23025.1560038146. The cubic root of 530157809 is about 809.3475460225.

The spelling of 530157809 in words is "five hundred thirty million, one hundred fifty-seven thousand, eight hundred nine".