199043443 has 4 divisors (see below), whose sum is σ = 205907040. Its totient is φ = 192179848.

The previous prime is 199043441. The next prime is 199043447. The reversal of 199043443 is 344340991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199043443 - 2¹ = 199043441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199043441) 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, 3431755 + ... + 3431812.

It is an arithmetic number, because the mean of its divisors is an integer number (51476760).

Almost surely, 2^199043443 is an apocalyptic number.

199043443 is a deficient number, since it is larger than the sum of its proper divisors (6863597).

199043443 is an equidigital number, since it uses as much as digits as its factorization.

199043443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6863596.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 199043443 is about 14108.2756919476. The cubic root of 199043443 is about 583.8697274242.

The spelling of 199043443 in words is "one hundred ninety-nine million, forty-three thousand, four hundred forty-three".