165320443 has 2 divisors, whose sum is σ = 165320444. Its totient is φ = 165320442.

The previous prime is 165320413. The next prime is 165320471. The reversal of 165320443 is 344023561.

It is an a-pointer prime, because the next prime (165320471) can be obtained adding 165320443 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165320443 - 2⁵ = 165320411 is a prime.

It is not a weakly prime, because it can be changed into another prime (165320413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82660221 + 82660222.

It is an arithmetic number, because the mean of its divisors is an integer number (82660222).

Almost surely, 2^165320443 is an apocalyptic number.

165320443 is a deficient number, since it is larger than the sum of its proper divisors (1).

165320443 is an equidigital number, since it uses as much as digits as its factorization.

165320443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 165320443 is about 12857.6997553995. The cubic root of 165320443 is about 548.8354898521.

The spelling of 165320443 in words is "one hundred sixty-five million, three hundred twenty thousand, four hundred forty-three".