530705921 has 2 divisors, whose sum is σ = 530705922. Its totient is φ = 530705920.

The previous prime is 530705869. The next prime is 530705941. The reversal of 530705921 is 129507035.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500014321 + 30691600 = 22361^2 + 5540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-530705921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (530705941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265352960 + 265352961.

It is an arithmetic number, because the mean of its divisors is an integer number (265352961).

Almost surely, 2^530705921 is an apocalyptic number.

It is an amenable number.

530705921 is a deficient number, since it is larger than the sum of its proper divisors (1).

530705921 is an equidigital number, since it uses as much as digits as its factorization.

530705921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 530705921 is about 23037.0553890900. The cubic root of 530705921 is about 809.6263688582.

The spelling of 530705921 in words is "five hundred thirty million, seven hundred five thousand, nine hundred twenty-one".