2009773 has 4 divisors (see below), whose sum is σ = 2016508. Its totient is φ = 2003040.

The previous prime is 2009771. The next prime is 2009783. The reversal of 2009773 is 3779002.

It is a happy number.

2009773 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3779002 = 2 ⋅1889501.

It can be written as a sum of positive squares in 2 ways, for example, as 195364 + 1814409 = 442^2 + 1347^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009773 - 2¹ = 2009771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2898 + ... + 3523.

It is an arithmetic number, because the mean of its divisors is an integer number (504127).

2^2009773 is an apocalyptic number.

It is an amenable number.

2009773 is a deficient number, since it is larger than the sum of its proper divisors (6735).

2009773 is an equidigital number, since it uses as much as digits as its factorization.

2009773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 2009773 is about 1417.6646288879. The cubic root of 2009773 is about 126.1969917649.

The spelling of 2009773 in words is "two million, nine thousand, seven hundred seventy-three".