198836249 has 2 divisors, whose sum is σ = 198836250. Its totient is φ = 198836248.

The previous prime is 198836227. The next prime is 198836279. The reversal of 198836249 is 942638891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183115024 + 15721225 = 13532^2 + 3965^2 .

It is a cyclic number.

It is not a de Polignac number, because 198836249 - 2¹⁶ = 198770713 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 198836197 and 198836206.

It is not a weakly prime, because it can be changed into another prime (198836279) 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, 99418124 + 99418125.

It is an arithmetic number, because the mean of its divisors is an integer number (99418125).

Almost surely, 2^198836249 is an apocalyptic number.

It is an amenable number.

198836249 is a deficient number, since it is larger than the sum of its proper divisors (1).

198836249 is an equidigital number, since it uses as much as digits as its factorization.

198836249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 50.

The square root of 198836249 is about 14100.9307848808. The cubic root of 198836249 is about 583.6670642889.

The spelling of 198836249 in words is "one hundred ninety-eight million, eight hundred thirty-six thousand, two hundred forty-nine".