194189992 has 16 divisors (see below), whose sum is σ = 365957460. Its totient is φ = 96601344.

The previous prime is 194189987. The next prime is 194189993. The reversal of 194189992 is 299981491.

It can be written as a sum of positive squares in 2 ways, for example, as 113081956 + 81108036 = 10634^2 + 9006^2 .

It is not an unprimeable number, because it can be changed into a prime (194189993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60033 + ... + 63184.

Almost surely, 2^194189992 is an apocalyptic number.

It is an amenable number.

194189992 is a deficient number, since it is larger than the sum of its proper divisors (171767468).

194189992 is a wasteful number, since it uses less digits than its factorization.

194189992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123420 (or 123416 counting only the distinct ones).

The product of its digits is 419904, while the sum is 52.

The square root of 194189992 is about 13935.2069234726. The cubic root of 194189992 is about 579.0849542698.

The spelling of 194189992 in words is "one hundred ninety-four million, one hundred eighty-nine thousand, nine hundred ninety-two".