199768589 has 2 divisors, whose sum is σ = 199768590. Its totient is φ = 199768588.

The previous prime is 199768579. The next prime is 199768627. The reversal of 199768589 is 985867991.

199768589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194742025 + 5026564 = 13955^2 + 2242^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199768589 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199768579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99884294 + 99884295.

It is an arithmetic number, because the mean of its divisors is an integer number (99884295).

Almost surely, 2^199768589 is an apocalyptic number.

It is an amenable number.

199768589 is a deficient number, since it is larger than the sum of its proper divisors (1).

199768589 is an equidigital number, since it uses as much as digits as its factorization.

199768589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 62.

The square root of 199768589 is about 14133.9516413493. The cubic root of 199768589 is about 584.5779106391.

The spelling of 199768589 in words is "one hundred ninety-nine million, seven hundred sixty-eight thousand, five hundred eighty-nine".