518109089 has 2 divisors, whose sum is σ = 518109090. Its totient is φ = 518109088.

The previous prime is 518109071. The next prime is 518109121. The reversal of 518109089 is 980901815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512252689 + 5856400 = 22633^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 518109089 - 2¹⁶ = 518043553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (518109019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259054544 + 259054545.

It is an arithmetic number, because the mean of its divisors is an integer number (259054545).

Almost surely, 2^518109089 is an apocalyptic number.

It is an amenable number.

518109089 is a deficient number, since it is larger than the sum of its proper divisors (1).

518109089 is an equidigital number, since it uses as much as digits as its factorization.

518109089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 518109089 is about 22762.0097750616. The cubic root of 518109089 is about 803.1692454622.

The spelling of 518109089 in words is "five hundred eighteen million, one hundred nine thousand, eighty-nine".