68191 has 8 divisors (see below), whose sum is σ = 74480. Its totient is φ = 62208.
The previous prime is 68171. The next prime is 68207. The reversal of 68191 is 19186.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a 8-Lehmer number, since φ(68191) divides (68191-1)8.
It is a cyclic number.
It is not a de Polignac number, because 68191 - 29 = 67679 is a prime.
It is a plaindrome in base 9 and base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (68111) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655 + ... + 751.
It is an arithmetic number, because the mean of its divisors is an integer number (9310).
268191 is an apocalyptic number.
68191 is a deficient number, since it is larger than the sum of its proper divisors (6289).
68191 is a wasteful number, since it uses less digits than its factorization.
68191 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 153.
The product of its digits is 432, while the sum is 25.
The square root of 68191 is about 261.1340651849. The cubic root of 68191 is about 40.8547307910.
The spelling of 68191 in words is "sixty-eight thousand, one hundred ninety-one".
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