84191 has 2 divisors, whose sum is σ = 84192. Its totient is φ = 84190.

The previous prime is 84181. The next prime is 84199. The reversal of 84191 is 19148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84191 - 2⁶ = 84127 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42095 + 42096.

It is an arithmetic number, because the mean of its divisors is an integer number (42096).

2⁸⁴¹⁹¹ is an apocalyptic number.

84191 is a deficient number, since it is larger than the sum of its proper divisors (1).

84191 is an equidigital number, since it uses as much as digits as its factorization.

84191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

The square root of 84191 is about 290.1568541324. The cubic root of 84191 is about 43.8283602461.

The spelling of 84191 in words is "eighty-four thousand, one hundred ninety-one".