530703821 has 2 divisors, whose sum is σ = 530703822. Its totient is φ = 530703820.

The previous prime is 530703809. The next prime is 530703853. The reversal of 530703821 is 128307035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529230025 + 1473796 = 23005^2 + 1214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-530703821 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (530703871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265351910 + 265351911.

It is an arithmetic number, because the mean of its divisors is an integer number (265351911).

Almost surely, 2^530703821 is an apocalyptic number.

It is an amenable number.

530703821 is a deficient number, since it is larger than the sum of its proper divisors (1).

530703821 is an equidigital number, since it uses as much as digits as its factorization.

530703821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 530703821 is about 23037.0098103031. The cubic root of 530703821 is about 809.6253009613.

The spelling of 530703821 in words is "five hundred thirty million, seven hundred three thousand, eight hundred twenty-one".