2490705809 has 2 divisors, whose sum is σ = 2490705810. Its totient is φ = 2490705808.

The previous prime is 2490705799. The next prime is 2490705859. The reversal of 2490705809 is 9085070942.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1523184784 + 967521025 = 39028^2 + 31105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2490705809 - 2⁴ = 2490705793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2490705809.

It is not a weakly prime, because it can be changed into another prime (2490705859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245352904 + 1245352905.

It is an arithmetic number, because the mean of its divisors is an integer number (1245352905).

Almost surely, 2^2490705809 is an apocalyptic number.

It is an amenable number.

2490705809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2490705809 is an equidigital number, since it uses as much as digits as its factorization.

2490705809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 2490705809 is about 49906.9715470695. The cubic root of 2490705809 is about 1355.5248320251.

The spelling of 2490705809 in words is "two billion, four hundred ninety million, seven hundred five thousand, eight hundred nine".