198913331 has 2 divisors, whose sum is σ = 198913332. Its totient is φ = 198913330.

The previous prime is 198913279. The next prime is 198913343. The reversal of 198913331 is 133319891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198913331 - 2²² = 194719027 is a prime.

It is a super-2 number, since 2×198913331² = 79133026499031122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198913531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99456665 + 99456666.

It is an arithmetic number, because the mean of its divisors is an integer number (99456666).

Almost surely, 2^198913331 is an apocalyptic number.

198913331 is a deficient number, since it is larger than the sum of its proper divisors (1).

198913331 is an equidigital number, since it uses as much as digits as its factorization.

198913331 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 198913331 is about 14103.6637438646. The cubic root of 198913331 is about 583.7424771180.

The spelling of 198913331 in words is "one hundred ninety-eight million, nine hundred thirteen thousand, three hundred thirty-one".