198134985 has 16 divisors (see below), whose sum is σ = 319147200. Its totient is φ = 104961600.

The previous prime is 198134969. The next prime is 198134987. The reversal of 198134985 is 589431891.

It is not a de Polignac number, because 198134985 - 2⁴ = 198134969 is a prime.

It is a super-3 number, since 3×198134985³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (198134987) 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, 42091 + ... + 46560.

It is an arithmetic number, because the mean of its divisors is an integer number (19946700).

Almost surely, 2^198134985 is an apocalyptic number.

198134985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198134985 is a deficient number, since it is larger than the sum of its proper divisors (121012215).

198134985 is a wasteful number, since it uses less digits than its factorization.

198134985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88808.

The product of its digits is 311040, while the sum is 48.

The square root of 198134985 is about 14076.0429453735. The cubic root of 198134985 is about 582.9800888983.

The spelling of 198134985 in words is "one hundred ninety-eight million, one hundred thirty-four thousand, nine hundred eighty-five".