198005109 has 8 divisors (see below), whose sum is σ = 264105600. Its totient is φ = 131954016.

The previous prime is 198005107. The next prime is 198005111. The reversal of 198005109 is 901500891.

It is an interprime number because it is at equal distance from previous prime (198005107) and next prime (198005111).

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

It is not a de Polignac number, because 198005109 - 2¹ = 198005107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198005109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198005107) 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, 1677 + ... + 19970.

It is an arithmetic number, because the mean of its divisors is an integer number (33013200).

Almost surely, 2^198005109 is an apocalyptic number.

It is an amenable number.

198005109 is a deficient number, since it is larger than the sum of its proper divisors (66100491).

198005109 is a wasteful number, since it uses less digits than its factorization.

198005109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24699.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 198005109 is about 14071.4288187092. The cubic root of 198005109 is about 582.8526813607.

The spelling of 198005109 in words is "one hundred ninety-eight million, five thousand, one hundred nine".