318615109 has 2 divisors, whose sum is σ = 318615110. Its totient is φ = 318615108.

The previous prime is 318615107. The next prime is 318615149. The reversal of 318615109 is 901516813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185558884 + 133056225 = 13622^2 + 11535^2 .

It is an emirp because it is prime and its reverse (901516813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318615109 - 2¹ = 318615107 is a prime.

Together with 318615107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318615107) 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, 159307554 + 159307555.

It is an arithmetic number, because the mean of its divisors is an integer number (159307555).

Almost surely, 2^318615109 is an apocalyptic number.

It is an amenable number.

318615109 is a deficient number, since it is larger than the sum of its proper divisors (1).

318615109 is an equidigital number, since it uses as much as digits as its factorization.

318615109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 318615109 is about 17849.7929679871. The cubic root of 318615109 is about 683.0022308420.

The spelling of 318615109 in words is "three hundred eighteen million, six hundred fifteen thousand, one hundred nine".