198945843 has 8 divisors (see below), whose sum is σ = 267042000. Its totient is φ = 131740128.

The previous prime is 198945823. The next prime is 198945853. The reversal of 198945843 is 348549891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198945843 - 2⁸ = 198945587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198945823) 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, 222088 + ... + 222981.

It is an arithmetic number, because the mean of its divisors is an integer number (33380250).

Almost surely, 2^198945843 is an apocalyptic number.

198945843 is a deficient number, since it is larger than the sum of its proper divisors (68096157).

198945843 is a wasteful number, since it uses less digits than its factorization.

198945843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445221.

The product of its digits is 1244160, while the sum is 51.

The square root of 198945843 is about 14104.8163050782. The cubic root of 198945843 is about 583.7742792458.

The spelling of 198945843 in words is "one hundred ninety-eight million, nine hundred forty-five thousand, eight hundred forty-three".