198889549 has 8 divisors (see below), whose sum is σ = 213308640. Its totient is φ = 184865616.

The previous prime is 198889547. The next prime is 198889553. The reversal of 198889549 is 945988891.

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

It is a cyclic number.

It is not a de Polignac number, because 198889549 - 2¹ = 198889547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198889547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97747 + ... + 99760.

It is an arithmetic number, because the mean of its divisors is an integer number (26663580).

Almost surely, 2^198889549 is an apocalyptic number.

198889549 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

198889549 is a deficient number, since it is larger than the sum of its proper divisors (14419091).

198889549 is a wasteful number, since it uses less digits than its factorization.

198889549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197579.

The product of its digits is 7464960, while the sum is 61.

The square root of 198889549 is about 14102.8206044039. The cubic root of 198889549 is about 583.7192121834.

The spelling of 198889549 in words is "one hundred ninety-eight million, eight hundred eighty-nine thousand, five hundred forty-nine".