318663617 has 2 divisors, whose sum is σ = 318663618. Its totient is φ = 318663616.

The previous prime is 318663593. The next prime is 318663641. The reversal of 318663617 is 716366813.

It is a balanced prime because it is at equal distance from previous prime (318663593) and next prime (318663641).

It can be written as a sum of positive squares in only one way, i.e., 301057201 + 17606416 = 17351^2 + 4196^2 .

It is a cyclic number.

It is not a de Polignac number, because 318663617 - 2¹² = 318659521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (318663017) 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, 159331808 + 159331809.

It is an arithmetic number, because the mean of its divisors is an integer number (159331809).

Almost surely, 2^318663617 is an apocalyptic number.

It is an amenable number.

318663617 is a deficient number, since it is larger than the sum of its proper divisors (1).

318663617 is an equidigital number, since it uses as much as digits as its factorization.

318663617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 318663617 is about 17851.1516995403. The cubic root of 318663617 is about 683.0368906244.

The spelling of 318663617 in words is "three hundred eighteen million, six hundred sixty-three thousand, six hundred seventeen".