8591089 has 4 divisors (see below), whose sum is σ = 9251956. Its totient is φ = 7930224.

The previous prime is 8591087. The next prime is 8591113. The reversal of 8591089 is 9801958.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9801958 = 2 ⋅4900979.

It can be written as a sum of positive squares in 2 ways, for example, as 4950625 + 3640464 = 2225^2 + 1908^2 .

It is a cyclic number.

It is not a de Polignac number, because 8591089 - 2¹ = 8591087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8591087) 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 in 3 ways as a sum of consecutive naturals, for example, 330414 + ... + 330439.

It is an arithmetic number, because the mean of its divisors is an integer number (2312989).

Almost surely, 2^8591089 is an apocalyptic number.

It is an amenable number.

8591089 is a deficient number, since it is larger than the sum of its proper divisors (660867).

8591089 is a wasteful number, since it uses less digits than its factorization.

8591089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660866.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 8591089 is about 2931.0559530654. The cubic root of 8591089 is about 204.8091739995.

The spelling of 8591089 in words is "eight million, five hundred ninety-one thousand, eighty-nine".