198041801 has 2 divisors, whose sum is σ = 198041802. Its totient is φ = 198041800.

The previous prime is 198041771. The next prime is 198041803. The reversal of 198041801 is 108140891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118831801 + 79210000 = 10901^2 + 8900^2 .

It is an emirp because it is prime and its reverse (108140891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198041801 - 2¹⁸ = 197779657 is a prime.

Together with 198041803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198041803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99020900 + 99020901.

It is an arithmetic number, because the mean of its divisors is an integer number (99020901).

Almost surely, 2^198041801 is an apocalyptic number.

It is an amenable number.

198041801 is a deficient number, since it is larger than the sum of its proper divisors (1).

198041801 is an equidigital number, since it uses as much as digits as its factorization.

198041801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 198041801 is about 14072.7325349415. The cubic root of 198041801 is about 582.8886816266. Note that the first 3 decimals are identical.

The spelling of 198041801 in words is "one hundred ninety-eight million, forty-one thousand, eight hundred one".