68045191 has 2 divisors, whose sum is σ = 68045192. Its totient is φ = 68045190.

The previous prime is 68045177. The next prime is 68045207. The reversal of 68045191 is 19154086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68045191 - 2⁹ = 68044679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68045291) 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, 34022595 + 34022596.

It is an arithmetic number, because the mean of its divisors is an integer number (34022596).

Almost surely, 2^68045191 is an apocalyptic number.

68045191 is a deficient number, since it is larger than the sum of its proper divisors (1).

68045191 is an equidigital number, since it uses as much as digits as its factorization.

68045191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 68045191 is about 8248.9509029937. The cubic root of 68045191 is about 408.2559088337.

The spelling of 68045191 in words is "sixty-eight million, forty-five thousand, one hundred ninety-one".