198889137 has 24 divisors (see below), whose sum is σ = 305454240. Its totient is φ = 124272000.

The previous prime is 198889129. The next prime is 198889199. The reversal of 198889137 is 731988891.

It is not a de Polignac number, because 198889137 - 2³ = 198889129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198889037) 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 23 ways as a sum of consecutive naturals, for example, 35814 + ... + 40992.

It is an arithmetic number, because the mean of its divisors is an integer number (12727260).

Almost surely, 2^198889137 is an apocalyptic number.

198889137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

198889137 is a deficient number, since it is larger than the sum of its proper divisors (106565103).

198889137 is a wasteful number, since it uses less digits than its factorization.

198889137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5453 (or 5450 counting only the distinct ones).

The product of its digits is 870912, while the sum is 54.

The square root of 198889137 is about 14102.8059973893. The cubic root of 198889137 is about 583.7188091248.

It can be divided in two parts, 1988 and 89137, that added together give a cube (91125 = 45³).

The spelling of 198889137 in words is "one hundred ninety-eight million, eight hundred eighty-nine thousand, one hundred thirty-seven".