199855189 has 8 divisors (see below), whose sum is σ = 201833280. Its totient is φ = 197884896.

The previous prime is 199855181. The next prime is 199855193. The reversal of 199855189 is 981558991.

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 199855189 - 2³ = 199855181 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 (199855181) 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, 58482 + ... + 61804.

It is an arithmetic number, because the mean of its divisors is an integer number (25229160).

Almost surely, 2^199855189 is an apocalyptic number.

It is an amenable number.

199855189 is a deficient number, since it is larger than the sum of its proper divisors (1978091).

199855189 is a wasteful number, since it uses less digits than its factorization.

199855189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899.

The product of its digits is 1166400, while the sum is 55.

The square root of 199855189 is about 14137.0148546290. The cubic root of 199855189 is about 584.6623702528.

The spelling of 199855189 in words is "one hundred ninety-nine million, eight hundred fifty-five thousand, one hundred eighty-nine".