198192161 has 2 divisors, whose sum is σ = 198192162. Its totient is φ = 198192160.

The previous prime is 198192149. The next prime is 198192179. The reversal of 198192161 is 161291891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187169761 + 11022400 = 13681^2 + 3320^2 .

It is a cyclic number.

It is not a de Polignac number, because 198192161 - 2²⁶ = 131083297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198192121) 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, 99096080 + 99096081.

It is an arithmetic number, because the mean of its divisors is an integer number (99096081).

Almost surely, 2^198192161 is an apocalyptic number.

It is an amenable number.

198192161 is a deficient number, since it is larger than the sum of its proper divisors (1).

198192161 is an equidigital number, since it uses as much as digits as its factorization.

198192161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 38.

The square root of 198192161 is about 14078.0737673874. The cubic root of 198192161 is about 583.0361605436.

The spelling of 198192161 in words is "one hundred ninety-eight million, one hundred ninety-two thousand, one hundred sixty-one".