198916617 has 4 divisors (see below), whose sum is σ = 265222160. Its totient is φ = 132611076.

The previous prime is 198916603. The next prime is 198916637. The reversal of 198916617 is 716619891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 198916617 - 2¹⁰ = 198915593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198916637) 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, 33152767 + ... + 33152772.

It is an arithmetic number, because the mean of its divisors is an integer number (66305540).

Almost surely, 2^198916617 is an apocalyptic number.

It is an amenable number.

198916617 is a deficient number, since it is larger than the sum of its proper divisors (66305543).

198916617 is an equidigital number, since it uses as much as digits as its factorization.

198916617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66305542.

The product of its digits is 163296, while the sum is 48.

The square root of 198916617 is about 14103.7802379362. The cubic root of 198916617 is about 583.7456915284.

The spelling of 198916617 in words is "one hundred ninety-eight million, nine hundred sixteen thousand, six hundred seventeen".