2905065809 has 2 divisors, whose sum is σ = 2905065810. Its totient is φ = 2905065808.

The previous prime is 2905065773. The next prime is 2905065829. The reversal of 2905065809 is 9085605092.

2905065809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1752259600 + 1152806209 = 41860^2 + 33953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2905065809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2905065809.

It is not a weakly prime, because it can be changed into another prime (2905065829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452532904 + 1452532905.

It is an arithmetic number, because the mean of its divisors is an integer number (1452532905).

Almost surely, 2^2905065809 is an apocalyptic number.

It is an amenable number.

2905065809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2905065809 is an equidigital number, since it uses as much as digits as its factorization.

2905065809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 2905065809 is about 53898.6624045532. The cubic root of 2905065809 is about 1426.8730160944.

The spelling of 2905065809 in words is "two billion, nine hundred five million, sixty-five thousand, eight hundred nine".