530861509 has 2 divisors, whose sum is σ = 530861510. Its totient is φ = 530861508.

The previous prime is 530861491. The next prime is 530861537. The reversal of 530861509 is 905168035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527988484 + 2873025 = 22978^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 530861509 - 2⁵ = 530861477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (530861549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265430754 + 265430755.

It is an arithmetic number, because the mean of its divisors is an integer number (265430755).

Almost surely, 2^530861509 is an apocalyptic number.

It is an amenable number.

530861509 is a deficient number, since it is larger than the sum of its proper divisors (1).

530861509 is an equidigital number, since it uses as much as digits as its factorization.

530861509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 530861509 is about 23040.4320489005. The cubic root of 530861509 is about 809.7054809957.

The spelling of 530861509 in words is "five hundred thirty million, eight hundred sixty-one thousand, five hundred nine".