8579991 has 16 divisors (see below), whose sum is σ = 13353984. Its totient is φ = 4797984.

The previous prime is 8579981. The next prime is 8579999. The reversal of 8579991 is 1999758.

It is not a de Polignac number, because 8579991 - 2⁶ = 8579927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8579991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8579999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3360 + ... + 5333.

It is an arithmetic number, because the mean of its divisors is an integer number (834624).

Almost surely, 2^8579991 is an apocalyptic number.

8579991 is a deficient number, since it is larger than the sum of its proper divisors (4773993).

8579991 is a wasteful number, since it uses less digits than its factorization.

8579991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8750.

The product of its digits is 204120, while the sum is 48.

The square root of 8579991 is about 2929.1621669003. The cubic root of 8579991 is about 204.7209449186.

The spelling of 8579991 in words is "eight million, five hundred seventy-nine thousand, nine hundred ninety-one".