198935843 has 2 divisors, whose sum is σ = 198935844. Its totient is φ = 198935842.

The previous prime is 198935777. The next prime is 198935851. The reversal of 198935843 is 348539891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198935843 - 2²⁰ = 197887267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198935791 and 198935800.

It is not a weakly prime, because it can be changed into another prime (198935873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99467921 + 99467922.

It is an arithmetic number, because the mean of its divisors is an integer number (99467922).

Almost surely, 2^198935843 is an apocalyptic number.

198935843 is a deficient number, since it is larger than the sum of its proper divisors (1).

198935843 is an equidigital number, since it uses as much as digits as its factorization.

198935843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The square root of 198935843 is about 14104.4618117814. The cubic root of 198935843 is about 583.7644979564.

The spelling of 198935843 in words is "one hundred ninety-eight million, nine hundred thirty-five thousand, eight hundred forty-three".