199027289 has 4 divisors (see below), whose sum is σ = 200459280. Its totient is φ = 197595300.

The previous prime is 199027259. The next prime is 199027291. The reversal of 199027289 is 982720991.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 982720991 = 7 ⋅140388713.

It is a cyclic number.

It is not a de Polignac number, because 199027289 - 2²⁴ = 182250073 is a prime.

It is a super-4 number, since 4×199027289⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199027259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715787 + ... + 716064.

It is an arithmetic number, because the mean of its divisors is an integer number (50114820).

Almost surely, 2^199027289 is an apocalyptic number.

It is an amenable number.

199027289 is a deficient number, since it is larger than the sum of its proper divisors (1431991).

199027289 is a wasteful number, since it uses less digits than its factorization.

199027289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431990.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 199027289 is about 14107.7031794690. The cubic root of 199027289 is about 583.8539317322.

The spelling of 199027289 in words is "one hundred ninety-nine million, twenty-seven thousand, two hundred eighty-nine".