199317289 has 4 divisors (see below), whose sum is σ = 200037124. Its totient is φ = 198597456.

The previous prime is 199317269. The next prime is 199317301. The reversal of 199317289 is 982713991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66145689 + 133171600 = 8133^2 + 11540^2 .

It is a cyclic number.

It is not a de Polignac number, because 199317289 - 2¹¹ = 199315241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199317269) 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, 359502 + ... + 360055.

It is an arithmetic number, because the mean of its divisors is an integer number (50009281).

Almost surely, 2^199317289 is an apocalyptic number.

It is an amenable number.

199317289 is a deficient number, since it is larger than the sum of its proper divisors (719835).

199317289 is an equidigital number, since it uses as much as digits as its factorization.

199317289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719834.

The product of its digits is 244944, while the sum is 49.

The square root of 199317289 is about 14117.9775109610. The cubic root of 199317289 is about 584.1373693632.

The spelling of 199317289 in words is "one hundred ninety-nine million, three hundred seventeen thousand, two hundred eighty-nine".