85555529 has 2 divisors, whose sum is σ = 85555530. Its totient is φ = 85555528.

The previous prime is 85555523. The next prime is 85555553. The reversal of 85555529 is 92555558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53655625 + 31899904 = 7325^2 + 5648^2 .

It is a cyclic number.

It is not a de Polignac number, because 85555529 - 2⁸ = 85555273 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 85555529.

It is not a weakly prime, because it can be changed into another prime (85555523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42777764 + 42777765.

It is an arithmetic number, because the mean of its divisors is an integer number (42777765).

Almost surely, 2^85555529 is an apocalyptic number.

It is an amenable number.

85555529 is a deficient number, since it is larger than the sum of its proper divisors (1).

85555529 is an equidigital number, since it uses as much as digits as its factorization.

85555529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450000, while the sum is 44.

The square root of 85555529 is about 9249.6231815139. The cubic root of 85555529 is about 440.6387571715.

The spelling of 85555529 in words is "eighty-five million, five hundred fifty-five thousand, five hundred twenty-nine".