198261943 has 8 divisors (see below), whose sum is σ = 217719936. Its totient is φ = 179043000.

The previous prime is 198261929. The next prime is 198261961. The reversal of 198261943 is 349162891.

It is a happy number.

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 198261943 - 2²¹ = 196164791 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 198261943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198261913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58021 + ... + 61342.

It is an arithmetic number, because the mean of its divisors is an integer number (27214992).

Almost surely, 2^198261943 is an apocalyptic number.

198261943 is a deficient number, since it is larger than the sum of its proper divisors (19457993).

198261943 is a wasteful number, since it uses less digits than its factorization.

198261943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119525.

The product of its digits is 93312, while the sum is 43.

The square root of 198261943 is about 14080.5519423068. The cubic root of 198261943 is about 583.1045800934.

The spelling of 198261943 in words is "one hundred ninety-eight million, two hundred sixty-one thousand, nine hundred forty-three".