68450191 has 2 divisors, whose sum is σ = 68450192. Its totient is φ = 68450190.

The previous prime is 68450149. The next prime is 68450203. The reversal of 68450191 is 19105486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68450191 - 2¹¹ = 68448143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68450491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34225095 + 34225096.

It is an arithmetic number, because the mean of its divisors is an integer number (34225096).

Almost surely, 2^68450191 is an apocalyptic number.

68450191 is a deficient number, since it is larger than the sum of its proper divisors (1).

68450191 is an equidigital number, since it uses as much as digits as its factorization.

68450191 is an evil number, because the sum of its binary digits is even.

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

The square root of 68450191 is about 8273.4630596867. The cubic root of 68450191 is about 409.0642769359.

The spelling of 68450191 in words is "sixty-eight million, four hundred fifty thousand, one hundred ninety-one".