198443573 has 2 divisors, whose sum is σ = 198443574. Its totient is φ = 198443572.

The previous prime is 198443521. The next prime is 198443579. The reversal of 198443573 is 375344891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198443569 + 4 = 14087^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 198443573 - 2²⁰ = 197394997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198443579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99221786 + 99221787.

It is an arithmetic number, because the mean of its divisors is an integer number (99221787).

Almost surely, 2^198443573 is an apocalyptic number.

It is an amenable number.

198443573 is a deficient number, since it is larger than the sum of its proper divisors (1).

198443573 is an equidigital number, since it uses as much as digits as its factorization.

198443573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 198443573 is about 14087.0001419749. Note that the first 3 decimals coincide. The cubic root of 198443573 is about 583.2825886380.

The spelling of 198443573 in words is "one hundred ninety-eight million, four hundred forty-three thousand, five hundred seventy-three".