198444647 has 2 divisors, whose sum is σ = 198444648. Its totient is φ = 198444646.

The previous prime is 198444643. The next prime is 198444691. The reversal of 198444647 is 746444891.

198444647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198444647 - 2² = 198444643 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 (198444643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99222323 + 99222324.

It is an arithmetic number, because the mean of its divisors is an integer number (99222324).

Almost surely, 2^198444647 is an apocalyptic number.

198444647 is a deficient number, since it is larger than the sum of its proper divisors (1).

198444647 is an equidigital number, since it uses as much as digits as its factorization.

198444647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 47.

The square root of 198444647 is about 14087.0382621756. The cubic root of 198444647 is about 583.2836409008.

The spelling of 198444647 in words is "one hundred ninety-eight million, four hundred forty-four thousand, six hundred forty-seven".