198122687 has 8 divisors (see below), whose sum is σ = 228079776. Its totient is φ = 168579072.

The previous prime is 198122681. The next prime is 198122689. The reversal of 198122687 is 786221891.

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 198122687 - 2¹⁴ = 198106303 is a prime.

It is a super-3 number, since 3×198122687³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198122681) 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, 102338 + ... + 104255.

It is an arithmetic number, because the mean of its divisors is an integer number (28509972).

Almost surely, 2^198122687 is an apocalyptic number.

198122687 is a deficient number, since it is larger than the sum of its proper divisors (29957089).

198122687 is a wasteful number, since it uses less digits than its factorization.

198122687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206737.

The product of its digits is 96768, while the sum is 44.

The square root of 198122687 is about 14075.6060970745. The cubic root of 198122687 is about 582.9680270246.

The spelling of 198122687 in words is "one hundred ninety-eight million, one hundred twenty-two thousand, six hundred eighty-seven".