198840349 has 2 divisors, whose sum is σ = 198840350. Its totient is φ = 198840348.

The previous prime is 198840319. The next prime is 198840353. The reversal of 198840349 is 943048891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160833124 + 38007225 = 12682^2 + 6165^2 .

It is a cyclic number.

It is not a de Polignac number, because 198840349 - 2²³ = 190451741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198840299 and 198840308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198840319) 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, 99420174 + 99420175.

It is an arithmetic number, because the mean of its divisors is an integer number (99420175).

Almost surely, 2^198840349 is an apocalyptic number.

It is an amenable number.

198840349 is a deficient number, since it is larger than the sum of its proper divisors (1).

198840349 is an equidigital number, since it uses as much as digits as its factorization.

198840349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 198840349 is about 14101.0761646053. The cubic root of 198840349 is about 583.6710759963.

The spelling of 198840349 in words is "one hundred ninety-eight million, eight hundred forty thousand, three hundred forty-nine".