198931133 has 2 divisors, whose sum is σ = 198931134. Its totient is φ = 198931132.

The previous prime is 198931087. The next prime is 198931153. The reversal of 198931133 is 331139891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107785924 + 91145209 = 10382^2 + 9547^2 .

It is a cyclic number.

It is not a de Polignac number, because 198931133 - 2⁸ = 198930877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198931153) 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, 99465566 + 99465567.

It is an arithmetic number, because the mean of its divisors is an integer number (99465567).

Almost surely, 2^198931133 is an apocalyptic number.

It is an amenable number.

198931133 is a deficient number, since it is larger than the sum of its proper divisors (1).

198931133 is an equidigital number, since it uses as much as digits as its factorization.

198931133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 198931133 is about 14104.2948423521. The cubic root of 198931133 is about 583.7598908555.

The spelling of 198931133 in words is "one hundred ninety-eight million, nine hundred thirty-one thousand, one hundred thirty-three".