268385291 has 2 divisors, whose sum is σ = 268385292. Its totient is φ = 268385290.

The previous prime is 268385267. The next prime is 268385297. The reversal of 268385291 is 192583862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268385291 - 2¹⁸ = 268123147 is a prime.

It is not a weakly prime, because it can be changed into another prime (268385297) 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, 134192645 + 134192646.

It is an arithmetic number, because the mean of its divisors is an integer number (134192646).

Almost surely, 2^268385291 is an apocalyptic number.

268385291 is a deficient number, since it is larger than the sum of its proper divisors (1).

268385291 is an equidigital number, since it uses as much as digits as its factorization.

268385291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 268385291 is about 16382.4690141627. The cubic root of 268385291 is about 645.0393910602.

The spelling of 268385291 in words is "two hundred sixty-eight million, three hundred eighty-five thousand, two hundred ninety-one".