194848189 has 4 divisors (see below), whose sum is σ = 194877180. Its totient is φ = 194819200.

The previous prime is 194848163. The next prime is 194848219. The reversal of 194848189 is 981848491.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 54022500 + 140825689 = 7350^2 + 11867^2 .

It is a cyclic number.

It is not a de Polignac number, because 194848189 - 2¹⁹ = 194323901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194848139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389 + ... + 19789.

It is an arithmetic number, because the mean of its divisors is an integer number (48719295).

Almost surely, 2^194848189 is an apocalyptic number.

It is an amenable number.

194848189 is a deficient number, since it is larger than the sum of its proper divisors (28991).

194848189 is a wasteful number, since it uses less digits than its factorization.

194848189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28990.

The product of its digits is 663552, while the sum is 52.

The square root of 194848189 is about 13958.8032796512. The cubic root of 194848189 is about 579.7384760315.

The spelling of 194848189 in words is "one hundred ninety-four million, eight hundred forty-eight thousand, one hundred eighty-nine".