198191983 has 8 divisors (see below), whose sum is σ = 227589120. Its totient is φ = 170691480.

The previous prime is 198191971. The next prime is 198192013. The reversal of 198191983 is 389191891.

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 198191983 - 2²¹ = 196094831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198191953) 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, 473935 + ... + 474352.

It is an arithmetic number, because the mean of its divisors is an integer number (28448640).

Almost surely, 2^198191983 is an apocalyptic number.

198191983 is a deficient number, since it is larger than the sum of its proper divisors (29397137).

198191983 is a wasteful number, since it uses less digits than its factorization.

198191983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948317.

The product of its digits is 139968, while the sum is 49.

The square root of 198191983 is about 14078.0674454983. The cubic root of 198191983 is about 583.0359859984.

The spelling of 198191983 in words is "one hundred ninety-eight million, one hundred ninety-one thousand, nine hundred eighty-three".