198743 has 4 divisors (see below), whose sum is σ = 207408. Its totient is φ = 190080.

The previous prime is 198733. The next prime is 198761. The reversal of 198743 is 347891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198743 - 2¹² = 194647 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 (198733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4298 + ... + 4343.

It is an arithmetic number, because the mean of its divisors is an integer number (51852).

2¹⁹⁸⁷⁴³ is an apocalyptic number.

198743 is a deficient number, since it is larger than the sum of its proper divisors (8665).

198743 is an equidigital number, since it uses as much as digits as its factorization.

198743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8664.

The product of its digits is 6048, while the sum is 32.

The square root of 198743 is about 445.8060116239. The cubic root of 198743 is about 58.3575808493.

The spelling of 198743 in words is "one hundred ninety-eight thousand, seven hundred forty-three".