199760689 has 2 divisors, whose sum is σ = 199760690. Its totient is φ = 199760688.

The previous prime is 199760633. The next prime is 199760719. The reversal of 199760689 is 986067991.

199760689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101909025 + 97851664 = 10095^2 + 9892^2 .

It is a cyclic number.

It is not a de Polignac number, because 199760689 - 2²¹ = 197663537 is a prime.

It is not a weakly prime, because it can be changed into another prime (199760629) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99880344 + 99880345.

It is an arithmetic number, because the mean of its divisors is an integer number (99880345).

Almost surely, 2^199760689 is an apocalyptic number.

It is an amenable number.

199760689 is a deficient number, since it is larger than the sum of its proper divisors (1).

199760689 is an equidigital number, since it uses as much as digits as its factorization.

199760689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 199760689 is about 14133.6721696805. The cubic root of 199760689 is about 584.5702046789.

The spelling of 199760689 in words is "one hundred ninety-nine million, seven hundred sixty thousand, six hundred eighty-nine".