198517671 has 12 divisors (see below), whose sum is σ = 312815880. Its totient is φ = 120313680.

The previous prime is 198517661. The next prime is 198517679. The reversal of 198517671 is 176715891.

It is not a de Polignac number, because 198517671 - 2²¹ = 196420519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198517679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002516 + ... + 1002713.

It is an arithmetic number, because the mean of its divisors is an integer number (26067990).

Almost surely, 2^198517671 is an apocalyptic number.

198517671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198517671 is a deficient number, since it is larger than the sum of its proper divisors (114298209).

198517671 is a wasteful number, since it uses less digits than its factorization.

198517671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005246 (or 2005243 counting only the distinct ones).

The product of its digits is 105840, while the sum is 45.

The square root of 198517671 is about 14089.6299099728. The cubic root of 198517671 is about 583.3551780300.

The spelling of 198517671 in words is "one hundred ninety-eight million, five hundred seventeen thousand, six hundred seventy-one".