199138189 has 8 divisors (see below), whose sum is σ = 204337728. Its totient is φ = 193955040.

The previous prime is 199138133. The next prime is 199138193. The reversal of 199138189 is 981831991.

It is a happy number.

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 199138189 - 2¹⁵ = 199105421 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 (199138109) 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, 22774 + ... + 30280.

It is an arithmetic number, because the mean of its divisors is an integer number (25542216).

Almost surely, 2^199138189 is an apocalyptic number.

It is an amenable number.

199138189 is a deficient number, since it is larger than the sum of its proper divisors (5199539).

199138189 is an equidigital number, since it uses as much as digits as its factorization.

199138189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8195.

The product of its digits is 139968, while the sum is 49.

The square root of 199138189 is about 14111.6331088928. The cubic root of 199138189 is about 583.9623546839.

The spelling of 199138189 in words is "one hundred ninety-nine million, one hundred thirty-eight thousand, one hundred eighty-nine".