2165773 has 2 divisors, whose sum is σ = 2165774. Its totient is φ = 2165772.

The previous prime is 2165771. The next prime is 2165809. The reversal of 2165773 is 3775612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1249924 + 915849 = 1118^2 + 957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165773 - 2¹ = 2165771 is a prime.

Together with 2165771, it forms a pair of twin primes.

2165773 is a lucky number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165771) 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, 1082886 + 1082887.

It is an arithmetic number, because the mean of its divisors is an integer number (1082887).

2^2165773 is an apocalyptic number.

It is an amenable number.

2165773 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165773 is an equidigital number, since it uses as much as digits as its factorization.

2165773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 31.

The square root of 2165773 is about 1471.6565496066. The cubic root of 2165773 is about 129.3811414698.

The spelling of 2165773 in words is "two million, one hundred sixty-five thousand, seven hundred seventy-three".