8518109 has 2 divisors, whose sum is σ = 8518110. Its totient is φ = 8518108.

The previous prime is 8518091. The next prime is 8518121. The reversal of 8518109 is 9018158.

It is a happy number.

Together with previous prime (8518091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8282884 + 235225 = 2878^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 8518109 - 2¹² = 8514013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8518189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4259054 + 4259055.

It is an arithmetic number, because the mean of its divisors is an integer number (4259055).

Almost surely, 2^8518109 is an apocalyptic number.

It is an amenable number.

8518109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8518109 is an equidigital number, since it uses as much as digits as its factorization.

8518109 is an evil number, because the sum of its binary digits is even.

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

The square root of 8518109 is about 2918.5799629272. The cubic root of 8518109 is about 204.2275830630.

The spelling of 8518109 in words is "eight million, five hundred eighteen thousand, one hundred nine".