2091597085 has 16 divisors (see below), whose sum is σ = 2527931952. Its totient is φ = 1661299200.

The previous prime is 2091597061. The next prime is 2091597103. The reversal of 2091597085 is 5807951902.

It can be written as a sum of positive squares in 8 ways, for example, as 640444249 + 1451152836 = 25307^2 + 38094^2 .

It is not a de Polignac number, because 2091597085 - 2²⁷ = 1957379357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687187 + ... + 690223.

It is an arithmetic number, because the mean of its divisors is an integer number (157995747).

Almost surely, 2^2091597085 is an apocalyptic number.

It is an amenable number.

2091597085 is a deficient number, since it is larger than the sum of its proper divisors (436334867).

2091597085 is a wasteful number, since it uses less digits than its factorization.

2091597085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984.

The product of its (nonzero) digits is 226800, while the sum is 46.

The square root of 2091597085 is about 45733.9817313122. The cubic root of 2091597085 is about 1278.8688503355.

The spelling of 2091597085 in words is "two billion, ninety-one million, five hundred ninety-seven thousand, eighty-five".