198084139 has 12 divisors (see below), whose sum is σ = 229190920. Its totient is φ = 170596800.

The previous prime is 198084109. The next prime is 198084143. The reversal of 198084139 is 931480891.

It is a de Polignac number, because none of the positive numbers 2^k-198084139 is a prime.

It is a super-2 number, since 2×198084139² = 78474652246742642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198084095 and 198084104.

It is not an unprimeable number, because it can be changed into a prime (198084109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40782 + ... + 45379.

Almost surely, 2^198084139 is an apocalyptic number.

198084139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

198084139 is a deficient number, since it is larger than the sum of its proper divisors (31106781).

198084139 is a wasteful number, since it uses less digits than its factorization.

198084139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86202 (or 86191 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 198084139 is about 14074.2367110973. The cubic root of 198084139 is about 582.9302159264.

The spelling of 198084139 in words is "one hundred ninety-eight million, eighty-four thousand, one hundred thirty-nine".