198955271 has 2 divisors, whose sum is σ = 198955272. Its totient is φ = 198955270.

The previous prime is 198955261. The next prime is 198955297. The reversal of 198955271 is 172559891.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198955271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198955261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99477635 + 99477636.

It is an arithmetic number, because the mean of its divisors is an integer number (99477636).

Almost surely, 2^198955271 is an apocalyptic number.

198955271 is a deficient number, since it is larger than the sum of its proper divisors (1).

198955271 is an equidigital number, since it uses as much as digits as its factorization.

198955271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 47.

The square root of 198955271 is about 14105.1505131991. The cubic root of 198955271 is about 583.7835007453.

The spelling of 198955271 in words is "one hundred ninety-eight million, nine hundred fifty-five thousand, two hundred seventy-one".