85091585 has 4 divisors (see below), whose sum is σ = 102109908. Its totient is φ = 68073264.

The previous prime is 85091581. The next prime is 85091593. The reversal of 85091585 is 58519058.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31494544 + 53597041 = 5612^2 + 7321^2 .

It is a cyclic number.

It is not a de Polignac number, because 85091585 - 2² = 85091581 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85091581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8509154 + ... + 8509163.

It is an arithmetic number, because the mean of its divisors is an integer number (25527477).

Almost surely, 2^85091585 is an apocalyptic number.

It is an amenable number.

85091585 is a deficient number, since it is larger than the sum of its proper divisors (17018323).

85091585 is a wasteful number, since it uses less digits than its factorization.

85091585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17018322.

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 85091585 is about 9224.5100140875. The cubic root of 85091585 is about 439.8408256885.

The spelling of 85091585 in words is "eighty-five million, ninety-one thousand, five hundred eighty-five".