198947 has 8 divisors (see below), whose sum is σ = 230496. Its totient is φ = 168192.

The previous prime is 198943. The next prime is 198953. The reversal of 198947 is 749891.

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 198947 - 2² = 198943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198947.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 198947.

It is not an unprimeable number, because it can be changed into a prime (198941) 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 7 ways as a sum of consecutive naturals, for example, 533 + ... + 825.

It is an arithmetic number, because the mean of its divisors is an integer number (28812).

2¹⁹⁸⁹⁴⁷ is an apocalyptic number.

198947 is a deficient number, since it is larger than the sum of its proper divisors (31549).

198947 is an equidigital number, since it uses as much as digits as its factorization.

198947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397.

The product of its digits is 18144, while the sum is 38.

The square root of 198947 is about 446.0347520093. The cubic root of 198947 is about 58.3775410920.

The spelling of 198947 in words is "one hundred ninety-eight thousand, nine hundred forty-seven".