318408361 has 2 divisors, whose sum is σ = 318408362. Its totient is φ = 318408360.

The previous prime is 318408359. The next prime is 318408397. The reversal of 318408361 is 163804813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318408336 + 25 = 17844^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 318408361 - 2¹ = 318408359 is a prime.

Together with 318408359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (318403361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159204180 + 159204181.

It is an arithmetic number, because the mean of its divisors is an integer number (159204181).

Almost surely, 2^318408361 is an apocalyptic number.

It is an amenable number.

318408361 is a deficient number, since it is larger than the sum of its proper divisors (1).

318408361 is an equidigital number, since it uses as much as digits as its factorization.

318408361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 318408361 is about 17844.0007005156. Note that the first 3 decimals coincide. The cubic root of 318408361 is about 682.8544664542.

The spelling of 318408361 in words is "three hundred eighteen million, four hundred eight thousand, three hundred sixty-one".