268975691 has 2 divisors, whose sum is σ = 268975692. Its totient is φ = 268975690.

The previous prime is 268975669. The next prime is 268975699. The reversal of 268975691 is 196579862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268975691 is a prime.

It is not a weakly prime, because it can be changed into another prime (268975699) 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, 134487845 + 134487846.

It is an arithmetic number, because the mean of its divisors is an integer number (134487846).

Almost surely, 2^268975691 is an apocalyptic number.

268975691 is a deficient number, since it is larger than the sum of its proper divisors (1).

268975691 is an equidigital number, since it uses as much as digits as its factorization.

268975691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 53.

The square root of 268975691 is about 16400.4783771694. The cubic root of 268975691 is about 645.5120353721.

The spelling of 268975691 in words is "two hundred sixty-eight million, nine hundred seventy-five thousand, six hundred ninety-one".