198871247 has 8 divisors (see below), whose sum is σ = 201129600. Its totient is φ = 196625880.

The previous prime is 198871217. The next prime is 198871249. The reversal of 198871247 is 742178891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198871247 - 2¹⁰ = 198870223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198871249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29372 + ... + 35502.

It is an arithmetic number, because the mean of its divisors is an integer number (25141200).

Almost surely, 2^198871247 is an apocalyptic number.

198871247 is a deficient number, since it is larger than the sum of its proper divisors (2258353).

198871247 is a wasteful number, since it uses less digits than its factorization.

198871247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6493.

The product of its digits is 225792, while the sum is 47.

The square root of 198871247 is about 14102.1717121867. The cubic root of 198871247 is about 583.7013068405.

The spelling of 198871247 in words is "one hundred ninety-eight million, eight hundred seventy-one thousand, two hundred forty-seven".