85557587 has 2 divisors, whose sum is σ = 85557588. Its totient is φ = 85557586.

The previous prime is 85557557. The next prime is 85557599. The reversal of 85557587 is 78575558.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85557587 - 2⁸ = 85557331 is a prime.

It is not a weakly prime, because it can be changed into another prime (85557517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42778793 + 42778794.

It is an arithmetic number, because the mean of its divisors is an integer number (42778794).

Almost surely, 2^85557587 is an apocalyptic number.

85557587 is a deficient number, since it is larger than the sum of its proper divisors (1).

85557587 is an equidigital number, since it uses as much as digits as its factorization.

85557587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1960000, while the sum is 50.

The square root of 85557587 is about 9249.7344286201. The cubic root of 85557587 is about 440.6422902660.

The spelling of 85557587 in words is "eighty-five million, five hundred fifty-seven thousand, five hundred eighty-seven".