165115289 has 2 divisors, whose sum is σ = 165115290. Its totient is φ = 165115288.

The previous prime is 165115267. The next prime is 165115297. The reversal of 165115289 is 982511561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103225600 + 61889689 = 10160^2 + 7867^2 .

It is a cyclic number.

It is not a de Polignac number, because 165115289 - 2²⁰ = 164066713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165115219) 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, 82557644 + 82557645.

It is an arithmetic number, because the mean of its divisors is an integer number (82557645).

Almost surely, 2^165115289 is an apocalyptic number.

It is an amenable number.

165115289 is a deficient number, since it is larger than the sum of its proper divisors (1).

165115289 is an equidigital number, since it uses as much as digits as its factorization.

165115289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 38.

The square root of 165115289 is about 12849.7194132790. The cubic root of 165115289 is about 548.6083705248.

The spelling of 165115289 in words is "one hundred sixty-five million, one hundred fifteen thousand, two hundred eighty-nine".