165068689 has 2 divisors, whose sum is σ = 165068690. Its totient is φ = 165068688.

The previous prime is 165068663. The next prime is 165068699. The reversal of 165068689 is 986860561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 40857664 = 11145^2 + 6392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165068689 is a prime.

It is not a weakly prime, because it can be changed into another prime (165068639) 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 as a sum of consecutive naturals, namely, 82534344 + 82534345.

It is an arithmetic number, because the mean of its divisors is an integer number (82534345).

Almost surely, 2^165068689 is an apocalyptic number.

It is an amenable number.

165068689 is a deficient number, since it is larger than the sum of its proper divisors (1).

165068689 is an equidigital number, since it uses as much as digits as its factorization.

165068689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 165068689 is about 12847.9060161569. The cubic root of 165068689 is about 548.5567549624.

The spelling of 165068689 in words is "one hundred sixty-five million, sixty-eight thousand, six hundred eighty-nine".