165065489 has 2 divisors, whose sum is σ = 165065490. Its totient is φ = 165065488.

The previous prime is 165065449. The next prime is 165065497. The reversal of 165065489 is 984560561.

165065489 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., 149328400 + 15737089 = 12220^2 + 3967^2 .

It is a cyclic number.

It is not a de Polignac number, because 165065489 - 2²⁰ = 164016913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (165065449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82532744 + 82532745.

It is an arithmetic number, because the mean of its divisors is an integer number (82532745).

Almost surely, 2^165065489 is an apocalyptic number.

It is an amenable number.

165065489 is a deficient number, since it is larger than the sum of its proper divisors (1).

165065489 is an equidigital number, since it uses as much as digits as its factorization.

165065489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 165065489 is about 12847.7814816411. The cubic root of 165065489 is about 548.5532101897.

The spelling of 165065489 in words is "one hundred sixty-five million, sixty-five thousand, four hundred eighty-nine".