198911417 has 4 divisors (see below), whose sum is σ = 198945780. Its totient is φ = 198877056.

The previous prime is 198911389. The next prime is 198911467. The reversal of 198911417 is 714119891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 714119891 = 89 ⋅8023819.

It can be written as a sum of positive squares in 2 ways, for example, as 93006736 + 105904681 = 9644^2 + 10291^2 .

It is a cyclic number.

It is not a de Polignac number, because 198911417 - 2⁸ = 198911161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198911467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6128 + ... + 20865.

It is an arithmetic number, because the mean of its divisors is an integer number (49736445).

Almost surely, 2^198911417 is an apocalyptic number.

It is an amenable number.

198911417 is a deficient number, since it is larger than the sum of its proper divisors (34363).

198911417 is an equidigital number, since it uses as much as digits as its factorization.

198911417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34362.

The product of its digits is 18144, while the sum is 41.

The square root of 198911417 is about 14103.5958889923. The cubic root of 198911417 is about 583.7406048006.

The spelling of 198911417 in words is "one hundred ninety-eight million, nine hundred eleven thousand, four hundred seventeen".