199072717 has 8 divisors (see below), whose sum is σ = 204842520. Its totient is φ = 193377600.

The previous prime is 199072661. The next prime is 199072721. The reversal of 199072717 is 717270991.

It can be written as a sum of positive squares in 4 ways, for example, as 144696841 + 54375876 = 12029^2 + 7374^2 .

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 199072717 - 2¹⁹ = 198548429 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 (199072217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13242 + ... + 23947.

It is an arithmetic number, because the mean of its divisors is an integer number (25605315).

Almost surely, 2^199072717 is an apocalyptic number.

It is an amenable number.

199072717 is a deficient number, since it is larger than the sum of its proper divisors (5769803).

199072717 is a wasteful number, since it uses less digits than its factorization.

199072717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37343.

The product of its (nonzero) digits is 55566, while the sum is 43.

The square root of 199072717 is about 14109.3131299862. The cubic root of 199072717 is about 583.8983499270.

The spelling of 199072717 in words is "one hundred ninety-nine million, seventy-two thousand, seven hundred seventeen".