268981091 has 2 divisors, whose sum is σ = 268981092. Its totient is φ = 268981090.

The previous prime is 268981087. The next prime is 268981099. The reversal of 268981091 is 190189862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268981091 - 2² = 268981087 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268981099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134490545 + 134490546.

It is an arithmetic number, because the mean of its divisors is an integer number (134490546).

Almost surely, 2^268981091 is an apocalyptic number.

268981091 is a deficient number, since it is larger than the sum of its proper divisors (1).

268981091 is an equidigital number, since it uses as much as digits as its factorization.

268981091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 268981091 is about 16400.6430056873. The cubic root of 268981091 is about 645.5163551449.

The spelling of 268981091 in words is "two hundred sixty-eight million, nine hundred eighty-one thousand, ninety-one".