189809198 has 16 divisors (see below), whose sum is σ = 289150560. Its totient is φ = 93430656.

The previous prime is 189809189. The next prime is 189809201. The reversal of 189809198 is 891908981.

189809198 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117311 + ... + 118917.

It is an arithmetic number, because the mean of its divisors is an integer number (18071910).

Almost surely, 2^189809198 is an apocalyptic number.

189809198 is a deficient number, since it is larger than the sum of its proper divisors (99341362).

189809198 is a wasteful number, since it uses less digits than its factorization.

189809198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 373248, while the sum is 53.

The square root of 189809198 is about 13777.1258976609. The cubic root of 189809198 is about 574.6972046590.

The spelling of 189809198 in words is "one hundred eighty-nine million, eight hundred nine thousand, one hundred ninety-eight".