198122939 has 8 divisors (see below), whose sum is σ = 226514400. Its totient is φ = 169753536.

The previous prime is 198122927. The next prime is 198122941. The reversal of 198122939 is 939221891.

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 a de Polignac number, because none of the positive numbers 2^k-198122939 is a prime.

It is a super-3 number, since 3×198122939³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198122939.

It is not an unprimeable number, because it can be changed into a prime (198122999) 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 7 ways as a sum of consecutive naturals, for example, 25037 + ... + 31985.

It is an arithmetic number, because the mean of its divisors is an integer number (28314300).

Almost surely, 2^198122939 is an apocalyptic number.

198122939 is a deficient number, since it is larger than the sum of its proper divisors (28391461).

198122939 is an equidigital number, since it uses as much as digits as its factorization.

198122939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11029.

The product of its digits is 69984, while the sum is 44.

The square root of 198122939 is about 14075.6150487288. The cubic root of 198122939 is about 582.9682741911.

The spelling of 198122939 in words is "one hundred ninety-eight million, one hundred twenty-two thousand, nine hundred thirty-nine".