198566353 has 2 divisors, whose sum is σ = 198566354. Its totient is φ = 198566352.

The previous prime is 198566327. The next prime is 198566369. The reversal of 198566353 is 353665891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126180289 + 72386064 = 11233^2 + 8508^2 .

It is an emirp because it is prime and its reverse (353665891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198566353 is a prime.

It is not a weakly prime, because it can be changed into another prime (198566323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99283176 + 99283177.

It is an arithmetic number, because the mean of its divisors is an integer number (99283177).

Almost surely, 2^198566353 is an apocalyptic number.

It is an amenable number.

198566353 is a deficient number, since it is larger than the sum of its proper divisors (1).

198566353 is an equidigital number, since it uses as much as digits as its factorization.

198566353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 46.

The square root of 198566353 is about 14091.3573867105. The cubic root of 198566353 is about 583.4028590510.

The spelling of 198566353 in words is "one hundred ninety-eight million, five hundred sixty-six thousand, three hundred fifty-three".