268971191 has 4 divisors (see below), whose sum is σ = 269161632. Its totient is φ = 268780752.

The previous prime is 268971187. The next prime is 268971247. The reversal of 268971191 is 191179862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 268971191 - 2² = 268971187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268971121) 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 in 3 ways as a sum of consecutive naturals, for example, 93086 + ... + 95931.

It is an arithmetic number, because the mean of its divisors is an integer number (67290408).

Almost surely, 2^268971191 is an apocalyptic number.

268971191 is a deficient number, since it is larger than the sum of its proper divisors (190441).

268971191 is a wasteful number, since it uses less digits than its factorization.

268971191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190440.

The product of its digits is 54432, while the sum is 44.

The square root of 268971191 is about 16400.3411854754. The cubic root of 268971191 is about 645.5084355172.

The spelling of 268971191 in words is "two hundred sixty-eight million, nine hundred seventy-one thousand, one hundred ninety-one".