198100839 has 8 divisors (see below), whose sum is σ = 264242160. Its totient is φ = 132013376.

The previous prime is 198100829. The next prime is 198100853. The reversal of 198100839 is 938001891.

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 198100839 - 2²⁰ = 197052263 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198100797 and 198100806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198100829) 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, 3912 + ... + 20285.

It is an arithmetic number, because the mean of its divisors is an integer number (33030270).

Almost surely, 2^198100839 is an apocalyptic number.

198100839 is a deficient number, since it is larger than the sum of its proper divisors (66141321).

198100839 is a wasteful number, since it uses less digits than its factorization.

198100839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26929.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 198100839 is about 14074.8299812111. The cubic root of 198100839 is about 582.9465972835.

The spelling of 198100839 in words is "one hundred ninety-eight million, one hundred thousand, eight hundred thirty-nine".