164191 has 2 divisors, whose sum is σ = 164192. Its totient is φ = 164190.

The previous prime is 164183. The next prime is 164201. The reversal of 164191 is 191461.

164191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (191461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164191 - 2³ = 164183 is a prime.

It is an Ulam number.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82095 + 82096.

It is an arithmetic number, because the mean of its divisors is an integer number (82096).

2¹⁶⁴¹⁹¹ is an apocalyptic number.

164191 is a deficient number, since it is larger than the sum of its proper divisors (1).

164191 is an equidigital number, since it uses as much as digits as its factorization.

164191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 164191 is about 405.2048864464. The cubic root of 164191 is about 54.7582780447.

It can be divided in two parts, 1641 and 91, that multiplied together give a triangular number (149331 = T₅₄₆).

The spelling of 164191 in words is "one hundred sixty-four thousand, one hundred ninety-one".