198733243 has 4 divisors (see below), whose sum is σ = 199466848. Its totient is φ = 197999640.

The previous prime is 198733211. The next prime is 198733261. The reversal of 198733243 is 342337891.

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 198733243 - 2⁵ = 198733211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198733196 and 198733205.

It is not an unprimeable number, because it can be changed into a prime (198733543) 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, 366396 + ... + 366937.

It is an arithmetic number, because the mean of its divisors is an integer number (49866712).

Almost surely, 2^198733243 is an apocalyptic number.

198733243 is a deficient number, since it is larger than the sum of its proper divisors (733605).

198733243 is an equidigital number, since it uses as much as digits as its factorization.

198733243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733604.

The product of its digits is 108864, while the sum is 40.

The square root of 198733243 is about 14097.2778577994. The cubic root of 198733243 is about 583.5662584001.

The spelling of 198733243 in words is "one hundred ninety-eight million, seven hundred thirty-three thousand, two hundred forty-three".