528361909 has 2 divisors, whose sum is σ = 528361910. Its totient is φ = 528361908.

The previous prime is 528361903. The next prime is 528361927. The reversal of 528361909 is 909163825.

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., 266407684 + 261954225 = 16322^2 + 16185^2 .

It is a cyclic number.

It is not a de Polignac number, because 528361909 - 2³ = 528361901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (528361901) 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, 264180954 + 264180955.

It is an arithmetic number, because the mean of its divisors is an integer number (264180955).

Almost surely, 2^528361909 is an apocalyptic number.

It is an amenable number.

528361909 is a deficient number, since it is larger than the sum of its proper divisors (1).

528361909 is an equidigital number, since it uses as much as digits as its factorization.

528361909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 528361909 is about 22986.1242709596. The cubic root of 528361909 is about 808.4326287581.

It can be divided in two parts, 52836 and 1909, that added together give a palindrome (54745).

The spelling of 528361909 in words is "five hundred twenty-eight million, three hundred sixty-one thousand, nine hundred nine".