268995791 has 2 divisors, whose sum is σ = 268995792. Its totient is φ = 268995790.

The previous prime is 268995763. The next prime is 268995799. The reversal of 268995791 is 197599862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268995791 - 2¹⁰ = 268994767 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 (268995799) 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, 134497895 + 134497896.

It is an arithmetic number, because the mean of its divisors is an integer number (134497896).

Almost surely, 2^268995791 is an apocalyptic number.

268995791 is a deficient number, since it is larger than the sum of its proper divisors (1).

268995791 is an equidigital number, since it uses as much as digits as its factorization.

268995791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 56.

The square root of 268995791 is about 16401.0911527252. The cubic root of 268995791 is about 645.5281142337.

The spelling of 268995791 in words is "two hundred sixty-eight million, nine hundred ninety-five thousand, seven hundred ninety-one".