8518091 has 2 divisors, whose sum is σ = 8518092. Its totient is φ = 8518090.

The previous prime is 8518079. The next prime is 8518109. The reversal of 8518091 is 1908158.

It is a happy number.

Together with next prime (8518109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8518091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8518021) 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 as a sum of consecutive naturals, namely, 4259045 + 4259046.

It is an arithmetic number, because the mean of its divisors is an integer number (4259046).

Almost surely, 2^8518091 is an apocalyptic number.

8518091 is a deficient number, since it is larger than the sum of its proper divisors (1).

8518091 is an equidigital number, since it uses as much as digits as its factorization.

8518091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 8518091 is about 2918.5768792341. The cubic root of 8518091 is about 204.2274392088.

The spelling of 8518091 in words is "eight million, five hundred eighteen thousand, ninety-one".