199017689 has 16 divisors (see below), whose sum is σ = 225396864. Its totient is φ = 174345600.

The previous prime is 199017659. The next prime is 199017701. The reversal of 199017689 is 986710991.

It is not a de Polignac number, because 199017689 - 2⁸ = 199017433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199017619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36629 + ... + 41709.

It is an arithmetic number, because the mean of its divisors is an integer number (14087304).

Almost surely, 2^199017689 is an apocalyptic number.

It is an amenable number.

199017689 is a deficient number, since it is larger than the sum of its proper divisors (26379175).

199017689 is a wasteful number, since it uses less digits than its factorization.

199017689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248.

The product of its (nonzero) digits is 244944, while the sum is 50.

The square root of 199017689 is about 14107.3629357155. The cubic root of 199017689 is about 583.8445442626.

The spelling of 199017689 in words is "one hundred ninety-nine million, seventeen thousand, six hundred eighty-nine".