852725609 has 2 divisors, whose sum is σ = 852725610. Its totient is φ = 852725608.

The previous prime is 852725597. The next prime is 852725617. The reversal of 852725609 is 906527258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497290000 + 355435609 = 22300^2 + 18853^2 .

It is a cyclic number.

It is not a de Polignac number, because 852725609 - 2⁸ = 852725353 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 852725609.

It is not a weakly prime, because it can be changed into another prime (852725669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426362804 + 426362805.

It is an arithmetic number, because the mean of its divisors is an integer number (426362805).

Almost surely, 2^852725609 is an apocalyptic number.

It is an amenable number.

852725609 is a deficient number, since it is larger than the sum of its proper divisors (1).

852725609 is an equidigital number, since it uses as much as digits as its factorization.

852725609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 852725609 is about 29201.4658707401. The cubic root of 852725609 is about 948.2796599510.

The spelling of 852725609 in words is "eight hundred fifty-two million, seven hundred twenty-five thousand, six hundred nine".