198000005 has 8 divisors (see below), whose sum is σ = 271542912. Its totient is φ = 135771408.

The previous prime is 198000001. The next prime is 198000053. The reversal of 198000005 is 500000891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198000005 - 2² = 198000001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198000001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2828537 + ... + 2828606.

It is an arithmetic number, because the mean of its divisors is an integer number (33942864).

Almost surely, 2^198000005 is an apocalyptic number.

It is an amenable number.

198000005 is a deficient number, since it is larger than the sum of its proper divisors (73542907).

198000005 is an equidigital number, since it uses as much as digits as its factorization.

198000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5657155.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 198000005 is about 14071.2474571376. The cubic root of 198000005 is about 582.8476732313.

Adding to 198000005 its reverse (500000891), we get a palindrome (698000896).

The spelling of 198000005 in words is "one hundred ninety-eight million, five", and thus it is an aban number.