268388317 has 2 divisors, whose sum is σ = 268388318. Its totient is φ = 268388316.

The previous prime is 268388279. The next prime is 268388321. The reversal of 268388317 is 713883862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189640441 + 78747876 = 13771^2 + 8874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268388317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268388387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134194158 + 134194159.

It is an arithmetic number, because the mean of its divisors is an integer number (134194159).

Almost surely, 2^268388317 is an apocalyptic number.

It is an amenable number.

268388317 is a deficient number, since it is larger than the sum of its proper divisors (1).

268388317 is an equidigital number, since it uses as much as digits as its factorization.

268388317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 46.

The square root of 268388317 is about 16382.5613687238. The cubic root of 268388317 is about 645.0418152888.

The spelling of 268388317 in words is "two hundred sixty-eight million, three hundred eighty-eight thousand, three hundred seventeen".