91160585 has 4 divisors (see below), whose sum is σ = 109392708. Its totient is φ = 72928464.

The previous prime is 91160581. The next prime is 91160591. The reversal of 91160585 is 58506119.

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 31685641 + 59474944 = 5629^2 + 7712^2 .

It is a cyclic number.

It is not a de Polignac number, because 91160585 - 2² = 91160581 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91160581) 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, 9116054 + ... + 9116063.

It is an arithmetic number, because the mean of its divisors is an integer number (27348177).

Almost surely, 2^91160585 is an apocalyptic number.

It is an amenable number.

91160585 is a deficient number, since it is larger than the sum of its proper divisors (18232123).

91160585 is a wasteful number, since it uses less digits than its factorization.

91160585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18232122.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 91160585 is about 9547.8052451859. The cubic root of 91160585 is about 450.0585685085.

The spelling of 91160585 in words is "ninety-one million, one hundred sixty thousand, five hundred eighty-five".