2520959809 has 2 divisors, whose sum is σ = 2520959810. Its totient is φ = 2520959808.

The previous prime is 2520959807. The next prime is 2520959849. The reversal of 2520959809 is 9089590252.

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., 1553936400 + 967023409 = 39420^2 + 31097^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520959809 - 2¹ = 2520959807 is a prime.

Together with 2520959807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2520959803) 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, 1260479904 + 1260479905.

It is an arithmetic number, because the mean of its divisors is an integer number (1260479905).

Almost surely, 2^2520959809 is an apocalyptic number.

It is an amenable number.

2520959809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520959809 is an equidigital number, since it uses as much as digits as its factorization.

2520959809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 49.

The square root of 2520959809 is about 50209.1606083989. The cubic root of 2520959809 is about 1360.9911692199.

The spelling of 2520959809 in words is "two billion, five hundred twenty million, nine hundred fifty-nine thousand, eight hundred nine".