8218091 has 8 divisors (see below), whose sum is σ = 9592320. Its totient is φ = 6893928.

The previous prime is 8218087. The next prime is 8218099. The reversal of 8218091 is 1908128.

8218091 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8218091 - 2² = 8218087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8218099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12161 + ... + 12818.

It is an arithmetic number, because the mean of its divisors is an integer number (1199040).

Almost surely, 2^8218091 is an apocalyptic number.

8218091 is a deficient number, since it is larger than the sum of its proper divisors (1374229).

8218091 is a wasteful number, since it uses less digits than its factorization.

8218091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25033.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 8218091 is about 2866.7212979290. The cubic root of 8218091 is about 201.8011555007.

The spelling of 8218091 in words is "eight million, two hundred eighteen thousand, ninety-one".