2442809 has 2 divisors, whose sum is σ = 2442810. Its totient is φ = 2442808.

The previous prime is 2442793. The next prime is 2442827. The reversal of 2442809 is 9082442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2016400 + 426409 = 1420^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 2442809 - 2⁴ = 2442793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2442859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1221404 + 1221405.

It is an arithmetic number, because the mean of its divisors is an integer number (1221405).

2^2442809 is an apocalyptic number.

It is an amenable number.

2442809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2442809 is an equidigital number, since it uses as much as digits as its factorization.

2442809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 2442809 is about 1562.9488155407. The cubic root of 2442809 is about 134.6779520599.

The spelling of 2442809 in words is "two million, four hundred forty-two thousand, eight hundred nine".