65073809 has 2 divisors, whose sum is σ = 65073810. Its totient is φ = 65073808.

The previous prime is 65073797. The next prime is 65073821. The reversal of 65073809 is 90837056.

65073809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (65073797) and next prime (65073821).

It can be written as a sum of positive squares in only one way, i.e., 65044225 + 29584 = 8065^2 + 172^2 .

It is a cyclic number.

It is not a de Polignac number, because 65073809 - 2⁴ = 65073793 is a prime.

It is not a weakly prime, because it can be changed into another prime (65079809) 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, 32536904 + 32536905.

It is an arithmetic number, because the mean of its divisors is an integer number (32536905).

Almost surely, 2^65073809 is an apocalyptic number.

It is an amenable number.

65073809 is a deficient number, since it is larger than the sum of its proper divisors (1).

65073809 is an equidigital number, since it uses as much as digits as its factorization.

65073809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 65073809 is about 8066.8338894513. The cubic root of 65073809 is about 402.2247058539.

The spelling of 65073809 in words is "sixty-five million, seventy-three thousand, eight hundred nine".