268716191 has 2 divisors, whose sum is σ = 268716192. Its totient is φ = 268716190.

The previous prime is 268716137. The next prime is 268716211. The reversal of 268716191 is 191617862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268716191 - 2²⁶ = 201607327 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268716101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134358095 + 134358096.

It is an arithmetic number, because the mean of its divisors is an integer number (134358096).

Almost surely, 2^268716191 is an apocalyptic number.

268716191 is a deficient number, since it is larger than the sum of its proper divisors (1).

268716191 is an equidigital number, since it uses as much as digits as its factorization.

268716191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 41.

The square root of 268716191 is about 16392.5651134897. The cubic root of 268716191 is about 645.3043781037.

The spelling of 268716191 in words is "two hundred sixty-eight million, seven hundred sixteen thousand, one hundred ninety-one".