2811393 has 12 divisors (see below), whose sum is σ = 4373460. Its totient is φ = 1730016.

The previous prime is 2811379. The next prime is 2811397. The reversal of 2811393 is 3931182.

It can be written as a sum of positive squares in 2 ways, for example, as 1912689 + 898704 = 1383^2 + 948^2 .

It is not a de Polignac number, because 2811393 - 2⁹ = 2810881 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2811397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11898 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (364455).

2^2811393 is an apocalyptic number.

It is an amenable number.

2811393 is a deficient number, since it is larger than the sum of its proper divisors (1562067).

2811393 is a wasteful number, since it uses less digits than its factorization.

2811393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24048 (or 24045 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 2811393 is about 1676.7209070087. The cubic root of 2811393 is about 141.1368823128.

The spelling of 2811393 in words is "two million, eight hundred eleven thousand, three hundred ninety-three".