198199089 has 96 divisors (see below), whose sum is σ = 354099200. Its totient is φ = 109058400.

The previous prime is 198199081. The next prime is 198199093. The reversal of 198199089 is 980991891.

It is not a de Polignac number, because 198199089 - 2³ = 198199081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198199081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1924212 + ... + 1924314.

Almost surely, 2^198199089 is an apocalyptic number.

198199089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

198199089 is a deficient number, since it is larger than the sum of its proper divisors (155900111).

198199089 is a wasteful number, since it uses less digits than its factorization.

198199089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The square root of 198199089 is about 14078.3198216264. The cubic root of 198199089 is about 583.0429539967.

The spelling of 198199089 in words is "one hundred ninety-eight million, one hundred ninety-nine thousand, eighty-nine".