68081191 has 8 divisors (see below), whose sum is σ = 68796864. Its totient is φ = 67368960.

The previous prime is 68081137. The next prime is 68081213. The reversal of 68081191 is 19118086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68081191 - 2²³ = 59692583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68081131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58471 + ... + 59623.

It is an arithmetic number, because the mean of its divisors is an integer number (8599608).

Almost surely, 2^68081191 is an apocalyptic number.

68081191 is a deficient number, since it is larger than the sum of its proper divisors (715673).

68081191 is a wasteful number, since it uses less digits than its factorization.

68081191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 68081191 is about 8251.1327101193. The cubic root of 68081191 is about 408.3278934534.

The spelling of 68081191 in words is "sixty-eight million, eighty-one thousand, one hundred ninety-one".