194326189 has 2 divisors, whose sum is σ = 194326190. Its totient is φ = 194326188.

The previous prime is 194326177. The next prime is 194326199. The reversal of 194326189 is 981623491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161722089 + 32604100 = 12717^2 + 5710^2 .

It is a cyclic number.

It is not a de Polignac number, because 194326189 - 2⁷ = 194326061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194326169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97163094 + 97163095.

It is an arithmetic number, because the mean of its divisors is an integer number (97163095).

Almost surely, 2^194326189 is an apocalyptic number.

It is an amenable number.

194326189 is a deficient number, since it is larger than the sum of its proper divisors (1).

194326189 is an equidigital number, since it uses as much as digits as its factorization.

194326189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The square root of 194326189 is about 13940.0928619576. The cubic root of 194326189 is about 579.2203048805.

The spelling of 194326189 in words is "one hundred ninety-four million, three hundred twenty-six thousand, one hundred eighty-nine".