164091 has 8 divisors (see below), whose sum is σ = 221760. Its totient is φ = 107912.

The previous prime is 164089. The next prime is 164093. The reversal of 164091 is 190461.

164091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (164089) and next prime (164093).

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 164091 - 2¹ = 164089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164093) 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, 81 + ... + 578.

It is an arithmetic number, because the mean of its divisors is an integer number (27720).

2¹⁶⁴⁰⁹¹ is an apocalyptic number.

164091 is a deficient number, since it is larger than the sum of its proper divisors (57669).

164091 is an equidigital number, since it uses as much as digits as its factorization.

164091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 164091 is about 405.0814732865. The cubic root of 164091 is about 54.7471590027.

It can be divided in two parts, 16 and 4091, that multiplied together give a palindrome (65456).

The spelling of 164091 in words is "one hundred sixty-four thousand, ninety-one".