198751193 has 2 divisors, whose sum is σ = 198751194. Its totient is φ = 198751192.

The previous prime is 198751177. The next prime is 198751247. The reversal of 198751193 is 391157891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195664144 + 3087049 = 13988^2 + 1757^2 .

It is a cyclic number.

It is not a de Polignac number, because 198751193 - 2⁴ = 198751177 is a prime.

It is not a weakly prime, because it can be changed into another prime (198751103) 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 as a sum of consecutive naturals, namely, 99375596 + 99375597.

It is an arithmetic number, because the mean of its divisors is an integer number (99375597).

Almost surely, 2^198751193 is an apocalyptic number.

It is an amenable number.

198751193 is a deficient number, since it is larger than the sum of its proper divisors (1).

198751193 is an equidigital number, since it uses as much as digits as its factorization.

198751193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 44.

The square root of 198751193 is about 14097.9144911579. The cubic root of 198751193 is about 583.5838275107.

The spelling of 198751193 in words is "one hundred ninety-eight million, seven hundred fifty-one thousand, one hundred ninety-three".