198881107 has 4 divisors (see below), whose sum is σ = 199206160. Its totient is φ = 198556056.

The previous prime is 198881077. The next prime is 198881131. The reversal of 198881107 is 701188891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198881107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198881707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161607 + ... + 162832.

It is an arithmetic number, because the mean of its divisors is an integer number (49801540).

Almost surely, 2^198881107 is an apocalyptic number.

198881107 is a deficient number, since it is larger than the sum of its proper divisors (325053).

198881107 is an equidigital number, since it uses as much as digits as its factorization.

198881107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325052.

The product of its (nonzero) digits is 32256, while the sum is 43.

The square root of 198881107 is about 14102.5212993989. The cubic root of 198881107 is about 583.7109532824.

The spelling of 198881107 in words is "one hundred ninety-eight million, eight hundred eighty-one thousand, one hundred seven".