2873809 has 2 divisors, whose sum is σ = 2873810. Its totient is φ = 2873808.

The previous prime is 2873797. The next prime is 2873837. The reversal of 2873809 is 9083782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2873025 + 784 = 1695^2 + 28^2 .

It is a cyclic number.

It is not a de Polignac number, because 2873809 - 2⁵ = 2873777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2873839) 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 as a sum of consecutive naturals, namely, 1436904 + 1436905.

It is an arithmetic number, because the mean of its divisors is an integer number (1436905).

2^2873809 is an apocalyptic number.

It is an amenable number.

2873809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2873809 is an equidigital number, since it uses as much as digits as its factorization.

2873809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 2873809 is about 1695.2312526614. The cubic root of 2873809 is about 142.1737112338.

It can be divided in two parts, 287 and 3809, that added together give a 12-th power (4096 = 2¹²).

The spelling of 2873809 in words is "two million, eight hundred seventy-three thousand, eight hundred nine".