199168589 has 2 divisors, whose sum is σ = 199168590. Its totient is φ = 199168588.

The previous prime is 199168577. The next prime is 199168591. The reversal of 199168589 is 985861991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138250564 + 60918025 = 11758^2 + 7805^2 .

It is an emirp because it is prime and its reverse (985861991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199168589 - 2⁴ = 199168573 is a prime.

It is a Sophie Germain prime.

Together with 199168591, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199167589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99584294 + 99584295.

It is an arithmetic number, because the mean of its divisors is an integer number (99584295).

Almost surely, 2^199168589 is an apocalyptic number.

It is an amenable number.

199168589 is a deficient number, since it is larger than the sum of its proper divisors (1).

199168589 is an equidigital number, since it uses as much as digits as its factorization.

199168589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 56.

The square root of 199168589 is about 14112.7101932974. The cubic root of 199168589 is about 583.9920686435.

The spelling of 199168589 in words is "one hundred ninety-nine million, one hundred sixty-eight thousand, five hundred eighty-nine".