6191 has 4 divisors (see below), whose sum is σ = 6384.
Its totient is φ = 6000.
The previous prime is 6173. The next prime is 6197. The reversal of 6191 is 1916.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 6191 - 210 = 5167 is a prime.
It is a Duffinian number.
It is a plaindrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (6197) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35 + ... + 116.
It is an arithmetic number, because the mean of its divisors is an integer number (1596).
26191 is an apocalyptic number.
6191 is a deficient number, since it is larger than the sum of its proper divisors (193).
6191 is a wasteful number, since it uses less digits than its factorization.
6191 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 192.
The product of its digits is 54, while the sum is 17.
The square root of 6191 is about 78.6829079280.
The cubic root of 6191 is about 18.3620120476.
The spelling of 6191 in words is "six thousand, one hundred ninety-one".