198281801 has 2 divisors, whose sum is σ = 198281802. Its totient is φ = 198281800.

The previous prime is 198281773. The next prime is 198281819. The reversal of 198281801 is 108182891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161315401 + 36966400 = 12701^2 + 6080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198281801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198281821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99140900 + 99140901.

It is an arithmetic number, because the mean of its divisors is an integer number (99140901).

Almost surely, 2^198281801 is an apocalyptic number.

It is an amenable number.

198281801 is a deficient number, since it is larger than the sum of its proper divisors (1).

198281801 is an equidigital number, since it uses as much as digits as its factorization.

198281801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 38.

The square root of 198281801 is about 14081.2570816671. The cubic root of 198281801 is about 583.1240474438.

The spelling of 198281801 in words is "one hundred ninety-eight million, two hundred eighty-one thousand, eight hundred one".