198122405 has 16 divisors (see below), whose sum is σ = 269512320. Its totient is φ = 138604608.

The previous prime is 198122401. The next prime is 198122423. The reversal of 198122405 is 504221891.

It is a cyclic number.

It is not a de Polignac number, because 198122405 - 2² = 198122401 is a prime.

It is a super-3 number, since 3×198122405³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198122401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78977 + ... + 81446.

It is an arithmetic number, because the mean of its divisors is an integer number (16844520).

Almost surely, 2^198122405 is an apocalyptic number.

It is an amenable number.

198122405 is a deficient number, since it is larger than the sum of its proper divisors (71389915).

198122405 is a wasteful number, since it uses less digits than its factorization.

198122405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160460.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 198122405 is about 14075.5960797403. The cubic root of 198122405 is about 582.9677504332.

The spelling of 198122405 in words is "one hundred ninety-eight million, one hundred twenty-two thousand, four hundred five".