68423309191 has 2 divisors, whose sum is σ = 68423309192. Its totient is φ = 68423309190.

The previous prime is 68423309179. The next prime is 68423309249. The reversal of 68423309191 is 19190332486.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68423309191 - 2¹⁵ = 68423276423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68423309291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34211654595 + 34211654596.

It is an arithmetic number, because the mean of its divisors is an integer number (34211654596).

Almost surely, 2^68423309191 is an apocalyptic number.

68423309191 is a deficient number, since it is larger than the sum of its proper divisors (1).

68423309191 is an equidigital number, since it uses as much as digits as its factorization.

68423309191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 68423309191 in words is "sixty-eight billion, four hundred twenty-three million, three hundred nine thousand, one hundred ninety-one".