198704543 has 4 divisors (see below), whose sum is σ = 198756480. Its totient is φ = 198652608.

The previous prime is 198704509. The next prime is 198704557. The reversal of 198704543 is 345407891.

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 198704543 - 2¹⁴ = 198688159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198704543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198704503) 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, 19730 + ... + 28047.

It is an arithmetic number, because the mean of its divisors is an integer number (49689120).

Almost surely, 2^198704543 is an apocalyptic number.

198704543 is a deficient number, since it is larger than the sum of its proper divisors (51937).

198704543 is an equidigital number, since it uses as much as digits as its factorization.

198704543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51936.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 198704543 is about 14096.2598940286. The cubic root of 198704543 is about 583.5381652006.

The spelling of 198704543 in words is "one hundred ninety-eight million, seven hundred four thousand, five hundred forty-three".