2312809 has 2 divisors, whose sum is σ = 2312810. Its totient is φ = 2312808.

The previous prime is 2312801. The next prime is 2312861. The reversal of 2312809 is 9082132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2205225 + 107584 = 1485^2 + 328^2 .

It is a cyclic number.

It is not a de Polignac number, because 2312809 - 2³ = 2312801 is a prime.

It is not a weakly prime, because it can be changed into another prime (2312801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156404 + 1156405.

It is an arithmetic number, because the mean of its divisors is an integer number (1156405).

2^2312809 is an apocalyptic number.

It is an amenable number.

2312809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2312809 is an equidigital number, since it uses as much as digits as its factorization.

2312809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2312809 is about 1520.7922277550. The cubic root of 2312809 is about 132.2452015655.

The spelling of 2312809 in words is "two million, three hundred twelve thousand, eight hundred nine".