2385809 has 2 divisors, whose sum is σ = 2385810. Its totient is φ = 2385808.

The previous prime is 2385787. The next prime is 2385827. The reversal of 2385809 is 9085832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2356225 + 29584 = 1535^2 + 172^2 .

It is a cyclic number.

It is not a de Polignac number, because 2385809 - 2⁸ = 2385553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2385829) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1192904 + 1192905.

It is an arithmetic number, because the mean of its divisors is an integer number (1192905).

2^2385809 is an apocalyptic number.

It is an amenable number.

2385809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2385809 is an equidigital number, since it uses as much as digits as its factorization.

2385809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 2385809 is about 1544.6064223614. The cubic root of 2385809 is about 133.6221814378.

The spelling of 2385809 in words is "two million, three hundred eighty-five thousand, eight hundred nine".