198830081 has 2 divisors, whose sum is σ = 198830082. Its totient is φ = 198830080.

The previous prime is 198830053. The next prime is 198830131. The reversal of 198830081 is 180038891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112042225 + 86787856 = 10585^2 + 9316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198830081 is a prime.

It is a super-2 number, since 2×198830081² = 79066802220933122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (198830381) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99415040 + 99415041.

It is an arithmetic number, because the mean of its divisors is an integer number (99415041).

Almost surely, 2^198830081 is an apocalyptic number.

It is an amenable number.

198830081 is a deficient number, since it is larger than the sum of its proper divisors (1).

198830081 is an equidigital number, since it uses as much as digits as its factorization.

198830081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 198830081 is about 14100.7120742181. The cubic root of 198830081 is about 583.6610290117.

The spelling of 198830081 in words is "one hundred ninety-eight million, eight hundred thirty thousand, eighty-one".