198136271 has 2 divisors, whose sum is σ = 198136272. Its totient is φ = 198136270.

The previous prime is 198136201. The next prime is 198136277. The reversal of 198136271 is 172631891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198136271 is a prime.

It is a super-3 number, since 3×198136271³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198136277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99068135 + 99068136.

It is an arithmetic number, because the mean of its divisors is an integer number (99068136).

Almost surely, 2^198136271 is an apocalyptic number.

198136271 is a deficient number, since it is larger than the sum of its proper divisors (1).

198136271 is an equidigital number, since it uses as much as digits as its factorization.

198136271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 198136271 is about 14076.0886257511. The cubic root of 198136271 is about 582.9813501777.

The spelling of 198136271 in words is "one hundred ninety-eight million, one hundred thirty-six thousand, two hundred seventy-one".