165105443 has 2 divisors, whose sum is σ = 165105444. Its totient is φ = 165105442.

The previous prime is 165105427. The next prime is 165105463. The reversal of 165105443 is 344501561.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165105443 - 2⁴ = 165105427 is a prime.

It is not a weakly prime, because it can be changed into another prime (165105403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82552721 + 82552722.

It is an arithmetic number, because the mean of its divisors is an integer number (82552722).

Almost surely, 2^165105443 is an apocalyptic number.

165105443 is a deficient number, since it is larger than the sum of its proper divisors (1).

165105443 is an equidigital number, since it uses as much as digits as its factorization.

165105443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 165105443 is about 12849.3362863613. The cubic root of 165105443 is about 548.5974656082.

The spelling of 165105443 in words is "one hundred sixty-five million, one hundred five thousand, four hundred forty-three".