2723665 has 12 divisors (see below), whose sum is σ = 3802356. Its totient is φ = 1867488.

The previous prime is 2723641. The next prime is 2723687. The reversal of 2723665 is 5663272.

2723665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 603729 + 2119936 = 777^2 + 1456^2 .

It is not a de Polignac number, because 2723665 - 2⁹ = 2723153 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 7² + 2¹⁹ + 3¹³ + 6⁴ + 6⁴ + 5⁷ .

It is a Duffinian number.

2723665 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5314 + ... + 5803.

It is an arithmetic number, because the mean of its divisors is an integer number (316863).

2^2723665 is an apocalyptic number.

It is an amenable number.

2723665 is a deficient number, since it is larger than the sum of its proper divisors (1078691).

2723665 is a wasteful number, since it uses less digits than its factorization.

2723665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11136 (or 11129 counting only the distinct ones).

The product of its digits is 15120, while the sum is 31.

The square root of 2723665 is about 1650.3529925443. The cubic root of 2723665 is about 139.6533088414.

The spelling of 2723665 in words is "two million, seven hundred twenty-three thousand, six hundred sixty-five".