198984897 has 16 divisors (see below), whose sum is σ = 295392000. Its totient is φ = 132386832.

The previous prime is 198984893. The next prime is 198984901. The reversal of 198984897 is 798489891.

It is an interprime number because it is at equal distance from previous prime (198984893) and next prime (198984901).

It is not a de Polignac number, because 198984897 - 2² = 198984893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198984893) 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 15 ways as a sum of consecutive naturals, for example, 6504 + ... + 20982.

It is an arithmetic number, because the mean of its divisors is an integer number (18462000).

Almost surely, 2^198984897 is an apocalyptic number.

It is an amenable number.

198984897 is a deficient number, since it is larger than the sum of its proper divisors (96407103).

198984897 is a wasteful number, since it uses less digits than its factorization.

198984897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14997 (or 14991 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 63.

The square root of 198984897 is about 14106.2006578667. The cubic root of 198984897 is about 583.8124759541.

The spelling of 198984897 in words is "one hundred ninety-eight million, nine hundred eighty-four thousand, eight hundred ninety-seven".