318689113 has 2 divisors, whose sum is σ = 318689114. Its totient is φ = 318689112.

The previous prime is 318689099. The next prime is 318689141. The reversal of 318689113 is 311986813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306495049 + 12194064 = 17507^2 + 3492^2 .

It is an emirp because it is prime and its reverse (311986813) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318689113 is a prime.

It is not a weakly prime, because it can be changed into another prime (318689183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159344556 + 159344557.

It is an arithmetic number, because the mean of its divisors is an integer number (159344557).

Almost surely, 2^318689113 is an apocalyptic number.

It is an amenable number.

318689113 is a deficient number, since it is larger than the sum of its proper divisors (1).

318689113 is an equidigital number, since it uses as much as digits as its factorization.

318689113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 318689113 is about 17851.8658128499. The cubic root of 318689113 is about 683.0551065353.

The spelling of 318689113 in words is "three hundred eighteen million, six hundred eighty-nine thousand, one hundred thirteen".