198113839 has 16 divisors (see below), whose sum is σ = 254969856. Its totient is φ = 149392800.

The previous prime is 198113833. The next prime is 198113849. The reversal of 198113839 is 938311891.

It is a cyclic number.

It is not a de Polignac number, because 198113839 - 2⁵ = 198113807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198113795 and 198113804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198113833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39112 + ... + 43885.

It is an arithmetic number, because the mean of its divisors is an integer number (15935616).

Almost surely, 2^198113839 is an apocalyptic number.

198113839 is a deficient number, since it is larger than the sum of its proper divisors (56856017).

198113839 is a wasteful number, since it uses less digits than its factorization.

198113839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83046.

The product of its digits is 46656, while the sum is 43.

The square root of 198113839 is about 14075.2917909363. The cubic root of 198113839 is about 582.9593486008.

The spelling of 198113839 in words is "one hundred ninety-eight million, one hundred thirteen thousand, eight hundred thirty-nine".