198642341 has 2 divisors, whose sum is σ = 198642342. Its totient is φ = 198642340.

The previous prime is 198642319. The next prime is 198642343. The reversal of 198642341 is 143246891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163584100 + 35058241 = 12790^2 + 5921^2 .

It is an emirp because it is prime and its reverse (143246891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198642341 - 2¹⁴ = 198625957 is a prime.

Together with 198642343, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 198642295 and 198642304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198642343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99321170 + 99321171.

It is an arithmetic number, because the mean of its divisors is an integer number (99321171).

Almost surely, 2^198642341 is an apocalyptic number.

It is an amenable number.

198642341 is a deficient number, since it is larger than the sum of its proper divisors (1).

198642341 is an equidigital number, since it uses as much as digits as its factorization.

198642341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 198642341 is about 14094.0533914130. The cubic root of 198642341 is about 583.4772690437.

The spelling of 198642341 in words is "one hundred ninety-eight million, six hundred forty-two thousand, three hundred forty-one".