528027509 has 2 divisors, whose sum is σ = 528027510. Its totient is φ = 528027508.

The previous prime is 528027503. The next prime is 528027527. The reversal of 528027509 is 905720825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264062500 + 263965009 = 16250^2 + 16247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-528027509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (528027503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264013754 + 264013755.

It is an arithmetic number, because the mean of its divisors is an integer number (264013755).

Almost surely, 2^528027509 is an apocalyptic number.

It is an amenable number.

528027509 is a deficient number, since it is larger than the sum of its proper divisors (1).

528027509 is an equidigital number, since it uses as much as digits as its factorization.

528027509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 528027509 is about 22978.8491661354. The cubic root of 528027509 is about 808.2620405564.

The spelling of 528027509 in words is "five hundred twenty-eight million, twenty-seven thousand, five hundred nine".