198129871 has 2 divisors, whose sum is σ = 198129872. Its totient is φ = 198129870.

The previous prime is 198129829. The next prime is 198129907. The reversal of 198129871 is 178921891.

It is a strong prime.

It is an emirp because it is prime and its reverse (178921891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198129871 - 2¹⁵ = 198097103 is a prime.

It is a super-3 number, since 3×198129871³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99064935 + 99064936.

It is an arithmetic number, because the mean of its divisors is an integer number (99064936).

Almost surely, 2^198129871 is an apocalyptic number.

198129871 is a deficient number, since it is larger than the sum of its proper divisors (1).

198129871 is an equidigital number, since it uses as much as digits as its factorization.

198129871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 46.

The square root of 198129871 is about 14075.8612880349. The cubic root of 198129871 is about 582.9750731496.

The spelling of 198129871 in words is "one hundred ninety-eight million, one hundred twenty-nine thousand, eight hundred seventy-one".