528030509 has 2 divisors, whose sum is σ = 528030510. Its totient is φ = 528030508.

The previous prime is 528030499. The next prime is 528030563. The reversal of 528030509 is 905030825.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527988484 + 42025 = 22978^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 528030509 - 2⁴ = 528030493 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 (528030709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264015254 + 264015255.

It is an arithmetic number, because the mean of its divisors is an integer number (264015255).

Almost surely, 2^528030509 is an apocalyptic number.

It is an amenable number.

528030509 is a deficient number, since it is larger than the sum of its proper divisors (1).

528030509 is an equidigital number, since it uses as much as digits as its factorization.

528030509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 528030509 is about 22978.9144434632. The cubic root of 528030509 is about 808.2635712731.

The spelling of 528030509 in words is "five hundred twenty-eight million, thirty thousand, five hundred nine".