198445249 has 2 divisors, whose sum is σ = 198445250. Its totient is φ = 198445248.

The previous prime is 198445243. The next prime is 198445271. The reversal of 198445249 is 942544891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154554624 + 43890625 = 12432^2 + 6625^2 .

It is an emirp because it is prime and its reverse (942544891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198445249 - 2³ = 198445241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198445199 and 198445208.

It is not a weakly prime, because it can be changed into another prime (198445241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99222624 + 99222625.

It is an arithmetic number, because the mean of its divisors is an integer number (99222625).

Almost surely, 2^198445249 is an apocalyptic number.

It is an amenable number.

198445249 is a deficient number, since it is larger than the sum of its proper divisors (1).

198445249 is an equidigital number, since it uses as much as digits as its factorization.

198445249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 46.

The square root of 198445249 is about 14087.0596293194. The cubic root of 198445249 is about 583.2842307149.

The spelling of 198445249 in words is "one hundred ninety-eight million, four hundred forty-five thousand, two hundred forty-nine".