198134909 has 16 divisors (see below), whose sum is σ = 229219200. Its totient is φ = 167759424.

The previous prime is 198134891. The next prime is 198134929. The reversal of 198134909 is 909431891.

It is not a de Polignac number, because 198134909 - 2⁸ = 198134653 is a prime.

It is a super-3 number, since 3×198134909³ (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 198134909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198134929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261359 + ... + 262115.

It is an arithmetic number, because the mean of its divisors is an integer number (14326200).

Almost surely, 2^198134909 is an apocalyptic number.

It is an amenable number.

198134909 is a deficient number, since it is larger than the sum of its proper divisors (31084291).

198134909 is a wasteful number, since it uses less digits than its factorization.

198134909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172.

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

The square root of 198134909 is about 14076.0402457509. The cubic root of 198134909 is about 582.9800143590.

The spelling of 198134909 in words is "one hundred ninety-eight million, one hundred thirty-four thousand, nine hundred nine".