2813309 has 2 divisors, whose sum is σ = 2813310. Its totient is φ = 2813308.

The previous prime is 2813299. The next prime is 2813323. The reversal of 2813309 is 9033182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1651225 + 1162084 = 1285^2 + 1078^2 .

It is a cyclic number.

It is not a de Polignac number, because 2813309 - 2⁸ = 2813053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2813329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1406654 + 1406655.

It is an arithmetic number, because the mean of its divisors is an integer number (1406655).

2^2813309 is an apocalyptic number.

It is an amenable number.

2813309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2813309 is an equidigital number, since it uses as much as digits as its factorization.

2813309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2813309 is about 1677.2921629818. The cubic root of 2813309 is about 141.1689372240.

The spelling of 2813309 in words is "two million, eight hundred thirteen thousand, three hundred nine".