198066149 has 2 divisors, whose sum is σ = 198066150. Its totient is φ = 198066148.

The previous prime is 198066139. The next prime is 198066157. The reversal of 198066149 is 941660891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130530625 + 67535524 = 11425^2 + 8218^2 .

It is a cyclic number.

It is not a de Polignac number, because 198066149 - 2⁸ = 198065893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198066109) 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, 99033074 + 99033075.

It is an arithmetic number, because the mean of its divisors is an integer number (99033075).

Almost surely, 2^198066149 is an apocalyptic number.

It is an amenable number.

198066149 is a deficient number, since it is larger than the sum of its proper divisors (1).

198066149 is an equidigital number, since it uses as much as digits as its factorization.

198066149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 198066149 is about 14073.5975855500. The cubic root of 198066149 is about 582.9125681529.

The spelling of 198066149 in words is "one hundred ninety-eight million, sixty-six thousand, one hundred forty-nine".