165443 has 2 divisors, whose sum is σ = 165444. Its totient is φ = 165442.

The previous prime is 165437. The next prime is 165449. The reversal of 165443 is 344561.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (165437) and next prime (165449).

It is a cyclic number.

It is not a de Polignac number, because 165443 - 2⁶ = 165379 is a prime.

It is a Sophie Germain prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 165443.

It is not a weakly prime, because it can be changed into another prime (165449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82721 + 82722.

It is an arithmetic number, because the mean of its divisors is an integer number (82722).

2¹⁶⁵⁴⁴³ is an apocalyptic number.

165443 is a deficient number, since it is larger than the sum of its proper divisors (1).

165443 is an equidigital number, since it uses as much as digits as its factorization.

165443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 165443 is about 406.7468500185. The cubic root of 165443 is about 54.8971079086.

The spelling of 165443 in words is "one hundred sixty-five thousand, four hundred forty-three".