2009764789 has 2 divisors, whose sum is σ = 2009764790. Its totient is φ = 2009764788.

The previous prime is 2009764787. The next prime is 2009764811. The reversal of 2009764789 is 9874679002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1578870225 + 430894564 = 39735^2 + 20758^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009764789 - 2¹ = 2009764787 is a prime.

Together with 2009764787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2009764787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004882394 + 1004882395.

It is an arithmetic number, because the mean of its divisors is an integer number (1004882395).

Almost surely, 2^2009764789 is an apocalyptic number.

It is an amenable number.

2009764789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009764789 is an equidigital number, since it uses as much as digits as its factorization.

2009764789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 2009764789 is about 44830.4002770441. The cubic root of 2009764789 is about 1261.9681990391.

The spelling of 2009764789 in words is "two billion, nine million, seven hundred sixty-four thousand, seven hundred eighty-nine".