198916111 has 8 divisors (see below), whose sum is σ = 209660400. Its totient is φ = 188199360.

The previous prime is 198916093. The next prime is 198916117. The reversal of 198916111 is 111619891.

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 198916111 - 2⁹ = 198915599 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 (198916117) 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, 8901 + ... + 21841.

It is an arithmetic number, because the mean of its divisors is an integer number (26207550).

Almost surely, 2^198916111 is an apocalyptic number.

198916111 is a deficient number, since it is larger than the sum of its proper divisors (10744289).

198916111 is a wasteful number, since it uses less digits than its factorization.

198916111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13769.

The product of its digits is 3888, while the sum is 37.

The square root of 198916111 is about 14103.7622994717. The cubic root of 198916111 is about 583.7451965545.

The spelling of 198916111 in words is "one hundred ninety-eight million, nine hundred sixteen thousand, one hundred eleven".