198271289 has 32 divisors (see below), whose sum is σ = 233020800. Its totient is φ = 167408640.

The previous prime is 198271273. The next prime is 198271301. The reversal of 198271289 is 982172891.

198271289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 198271289 - 2⁴ = 198271273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198271259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 571214 + ... + 571560.

It is an arithmetic number, because the mean of its divisors is an integer number (7281900).

Almost surely, 2^198271289 is an apocalyptic number.

198271289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

198271289 is a deficient number, since it is larger than the sum of its proper divisors (34749511).

198271289 is a wasteful number, since it uses less digits than its factorization.

198271289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its digits is 145152, while the sum is 47.

The square root of 198271289 is about 14080.8838145906. The cubic root of 198271289 is about 583.1137423994.

The spelling of 198271289 in words is "one hundred ninety-eight million, two hundred seventy-one thousand, two hundred eighty-nine".