268591133 has 2 divisors, whose sum is σ = 268591134. Its totient is φ = 268591132.

The previous prime is 268591097. The next prime is 268591139. The reversal of 268591133 is 331195862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267060964 + 1530169 = 16342^2 + 1237^2 .

It is a cyclic number.

It is not a de Polignac number, because 268591133 - 2¹⁰ = 268590109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268591139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134295566 + 134295567.

It is an arithmetic number, because the mean of its divisors is an integer number (134295567).

Almost surely, 2^268591133 is an apocalyptic number.

It is an amenable number.

268591133 is a deficient number, since it is larger than the sum of its proper divisors (1).

268591133 is an equidigital number, since it uses as much as digits as its factorization.

268591133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 268591133 is about 16388.7501964000. The cubic root of 268591133 is about 645.2042563644.

The spelling of 268591133 in words is "two hundred sixty-eight million, five hundred ninety-one thousand, one hundred thirty-three".