268968191 has 2 divisors, whose sum is σ = 268968192. Its totient is φ = 268968190.

The previous prime is 268968181. The next prime is 268968209. The reversal of 268968191 is 191869862.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268968191 - 2¹⁴ = 268951807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268968131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134484095 + 134484096.

It is an arithmetic number, because the mean of its divisors is an integer number (134484096).

Almost surely, 2^268968191 is an apocalyptic number.

268968191 is a deficient number, since it is larger than the sum of its proper divisors (1).

268968191 is an equidigital number, since it uses as much as digits as its factorization.

268968191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 50.

The square root of 268968191 is about 16400.2497237085. The cubic root of 268968191 is about 645.5060355917.

The spelling of 268968191 in words is "two hundred sixty-eight million, nine hundred sixty-eight thousand, one hundred ninety-one".