530749409 has 2 divisors, whose sum is σ = 530749410. Its totient is φ = 530749408.

The previous prime is 530749397. The next prime is 530749433. The reversal of 530749409 is 904947035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349577809 + 181171600 = 18697^2 + 13460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-530749409 is a prime.

It is not a weakly prime, because it can be changed into another prime (530749459) 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, 265374704 + 265374705.

It is an arithmetic number, because the mean of its divisors is an integer number (265374705).

Almost surely, 2^530749409 is an apocalyptic number.

It is an amenable number.

530749409 is a deficient number, since it is larger than the sum of its proper divisors (1).

530749409 is an equidigital number, since it uses as much as digits as its factorization.

530749409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 530749409 is about 23037.9992403854. Note that the first 3 decimals coincide. The cubic root of 530749409 is about 809.6484828442.

The spelling of 530749409 in words is "five hundred thirty million, seven hundred forty-nine thousand, four hundred nine".