199057198 has 8 divisors (see below), whose sum is σ = 298646208. Its totient is φ = 99508464.

The previous prime is 199057193. The next prime is 199057207. The reversal of 199057198 is 891750991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×199057198² = 79247536151222408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199057193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11715 + ... + 23137.

It is an arithmetic number, because the mean of its divisors is an integer number (37330776).

Almost surely, 2^199057198 is an apocalyptic number.

199057198 is a deficient number, since it is larger than the sum of its proper divisors (99589010).

199057198 is a wasteful number, since it uses less digits than its factorization.

199057198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20138.

The product of its (nonzero) digits is 204120, while the sum is 49.

The square root of 199057198 is about 14108.7631633677. The cubic root of 199057198 is about 583.8831766541.

The spelling of 199057198 in words is "one hundred ninety-nine million, fifty-seven thousand, one hundred ninety-eight".