530191309 has 2 divisors, whose sum is σ = 530191310. Its totient is φ = 530191308.

The previous prime is 530191303. The next prime is 530191327. The reversal of 530191309 is 903191035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366914025 + 163277284 = 19155^2 + 12778^2 .

It is a cyclic number.

It is not a de Polignac number, because 530191309 - 2²⁷ = 395973581 is a prime.

It is a super-2 number, since 2×530191309² = 562205648278266962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (530191303) 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, 265095654 + 265095655.

It is an arithmetic number, because the mean of its divisors is an integer number (265095655).

Almost surely, 2^530191309 is an apocalyptic number.

It is an amenable number.

530191309 is a deficient number, since it is larger than the sum of its proper divisors (1).

530191309 is an equidigital number, since it uses as much as digits as its factorization.

530191309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 530191309 is about 23025.8834575353. The cubic root of 530191309 is about 809.3645928786.

It can be divided in two parts, 53019 and 1309, that multiplied together give a triangular number (69401871 = T₁₁₇₈₁).

The spelling of 530191309 in words is "five hundred thirty million, one hundred ninety-one thousand, three hundred nine".