198477871 has 2 divisors, whose sum is σ = 198477872. Its totient is φ = 198477870.

The previous prime is 198477863. The next prime is 198477889. The reversal of 198477871 is 178774891.

198477871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (178774891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198477871 - 2³ = 198477863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198477271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99238935 + 99238936.

It is an arithmetic number, because the mean of its divisors is an integer number (99238936).

Almost surely, 2^198477871 is an apocalyptic number.

198477871 is a deficient number, since it is larger than the sum of its proper divisors (1).

198477871 is an equidigital number, since it uses as much as digits as its factorization.

198477871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 52.

The square root of 198477871 is about 14088.2174528930. The cubic root of 198477871 is about 583.3161905892.

The spelling of 198477871 in words is "one hundred ninety-eight million, four hundred seventy-seven thousand, eight hundred seventy-one".