198072247 has 2 divisors, whose sum is σ = 198072248. Its totient is φ = 198072246.

The previous prime is 198072229. The next prime is 198072269. The reversal of 198072247 is 742270891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198072247 - 2¹¹ = 198070199 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198072047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99036123 + 99036124.

It is an arithmetic number, because the mean of its divisors is an integer number (99036124).

Almost surely, 2^198072247 is an apocalyptic number.

198072247 is a deficient number, since it is larger than the sum of its proper divisors (1).

198072247 is an equidigital number, since it uses as much as digits as its factorization.

198072247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 198072247 is about 14073.8142306910. The cubic root of 198072247 is about 582.9185502694.

The spelling of 198072247 in words is "one hundred ninety-eight million, seventy-two thousand, two hundred forty-seven".