198134989 has 16 divisors (see below), whose sum is σ = 221482800. Its totient is φ = 175988736.

The previous prime is 198134987. The next prime is 198135019. The reversal of 198134989 is 989431891.

It can be written as a sum of positive squares in 8 ways, for example, as 45118089 + 153016900 = 6717^2 + 12370^2 .

It is a cyclic number.

It is not a de Polignac number, because 198134989 - 2¹ = 198134987 is a prime.

It is a super-3 number, since 3×198134989³ (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 (198134987) 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, 139917 + ... + 141325.

It is an arithmetic number, because the mean of its divisors is an integer number (13842675).

Almost surely, 2^198134989 is an apocalyptic number.

It is an amenable number.

198134989 is a deficient number, since it is larger than the sum of its proper divisors (23347811).

198134989 is a wasteful number, since it uses less digits than its factorization.

198134989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824.

The product of its digits is 559872, while the sum is 52.

The square root of 198134989 is about 14076.0430874589. The cubic root of 198134989 is about 582.9800928214.

The spelling of 198134989 in words is "one hundred ninety-eight million, one hundred thirty-four thousand, nine hundred eighty-nine".