199990017 has 12 divisors (see below), whose sum is σ = 289036644. Its totient is φ = 133251840.

The previous prime is 199990013. The next prime is 199990019. The reversal of 199990017 is 710099991.

It can be written as a sum of positive squares in 2 ways, for example, as 56565441 + 143424576 = 7521^2 + 11976^2 .

It is not a de Polignac number, because 199990017 - 2² = 199990013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199990013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14217 + ... + 24537.

It is an arithmetic number, because the mean of its divisors is an integer number (24086387).

Almost surely, 2^199990017 is an apocalyptic number.

It is an amenable number.

199990017 is a deficient number, since it is larger than the sum of its proper divisors (89046627).

199990017 is a wasteful number, since it uses less digits than its factorization.

199990017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12480 (or 12477 counting only the distinct ones).

The product of its (nonzero) digits is 45927, while the sum is 45.

The square root of 199990017 is about 14141.7826669766. The cubic root of 199990017 is about 584.7938173243.

The spelling of 199990017 in words is "one hundred ninety-nine million, nine hundred ninety thousand, seventeen".