194091 has 8 divisors (see below), whose sum is σ = 267264. Its totient is φ = 125160.

The previous prime is 194087. The next prime is 194093. The reversal of 194091 is 190491.

194091 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 194091 - 2² = 194087 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

194091 is strictly pandigital in base 7.

194091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (194093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951 + ... + 1136.

It is an arithmetic number, because the mean of its divisors is an integer number (33408).

2¹⁹⁴⁰⁹¹ is an apocalyptic number.

194091 is a deficient number, since it is larger than the sum of its proper divisors (73173).

194091 is a wasteful number, since it uses less digits than its factorization.

194091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 194091 is about 440.5576012283. The cubic root of 194091 is about 57.8986537730.

Subtracting from 194091 its reverse (190491), we obtain a square (3600 = 60²).

The spelling of 194091 in words is "one hundred ninety-four thousand, ninety-one".