198126831 has 16 divisors (see below), whose sum is σ = 302242304. Its totient is φ = 113089824.

The previous prime is 198126829. The next prime is 198126833. The reversal of 198126831 is 138621891.

It is an interprime number because it is at equal distance from previous prime (198126829) and next prime (198126833).

It is not a de Polignac number, because 198126831 - 2¹ = 198126829 is a prime.

It is a super-3 number, since 3×198126831³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 198126831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198126833) 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, 16206 + ... + 25668.

It is an arithmetic number, because the mean of its divisors is an integer number (18890144).

Almost surely, 2^198126831 is an apocalyptic number.

198126831 is a deficient number, since it is larger than the sum of its proper divisors (104115473).

198126831 is an equidigital number, since it uses as much as digits as its factorization.

198126831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10470.

The product of its digits is 20736, while the sum is 39.

The square root of 198126831 is about 14075.7533013335. The cubic root of 198126831 is about 582.9720915139.

The spelling of 198126831 in words is "one hundred ninety-eight million, one hundred twenty-six thousand, eight hundred thirty-one".