199806194 has 32 divisors (see below), whose sum is σ = 349345920. Its totient is φ = 83939328.

The previous prime is 199806193. The next prime is 199806197. The reversal of 199806194 is 491608991.

It is not an unprimeable number, because it can be changed into a prime (199806193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259442 + ... + 260210.

It is an arithmetic number, because the mean of its divisors is an integer number (10917060).

Almost surely, 2^199806194 is an apocalyptic number.

199806194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

199806194 is a deficient number, since it is larger than the sum of its proper divisors (149539726).

199806194 is a wasteful number, since it uses less digits than its factorization.

199806194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 199806194 is about 14135.2818861174. The cubic root of 199806194 is about 584.6145892000.

The spelling of 199806194 in words is "one hundred ninety-nine million, eight hundred six thousand, one hundred ninety-four".