198317922871 has 2 divisors, whose sum is σ = 198317922872. Its totient is φ = 198317922870.

The previous prime is 198317922863. The next prime is 198317922883. The reversal of 198317922871 is 178229713891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198317922871 - 2³ = 198317922863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198317922841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99158961435 + 99158961436.

It is an arithmetic number, because the mean of its divisors is an integer number (99158961436).

Almost surely, 2^198317922871 is an apocalyptic number.

198317922871 is a deficient number, since it is larger than the sum of its proper divisors (1).

198317922871 is an equidigital number, since it uses as much as digits as its factorization.

198317922871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 58.

The spelling of 198317922871 in words is "one hundred ninety-eight billion, three hundred seventeen million, nine hundred twenty-two thousand, eight hundred seventy-one".