198417 has 12 divisors (see below), whose sum is σ = 283280. Its totient is φ = 123192.

The previous prime is 198413. The next prime is 198427. The reversal of 198417 is 714891.

It is not a de Polignac number, because 198417 - 2² = 198413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3334 + ... + 3392.

2¹⁹⁸⁴¹⁷ is an apocalyptic number.

It is an amenable number.

198417 is a deficient number, since it is larger than the sum of its proper divisors (84863).

198417 is an equidigital number, since it uses as much as digits as its factorization.

198417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 81 counting only the distinct ones).

The product of its digits is 2016, while the sum is 30.

The square root of 198417 is about 445.4402316810. The cubic root of 198417 is about 58.3256552252.

The spelling of 198417 in words is "one hundred ninety-eight thousand, four hundred seventeen".