65575109 has 2 divisors, whose sum is σ = 65575110. Its totient is φ = 65575108.

The previous prime is 65575091. The next prime is 65575117. The reversal of 65575109 is 90157556.

65575109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (65575091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58094884 + 7480225 = 7622^2 + 2735^2 .

It is a cyclic number.

It is not a de Polignac number, because 65575109 - 2⁸ = 65574853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65575009) 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, 32787554 + 32787555.

It is an arithmetic number, because the mean of its divisors is an integer number (32787555).

Almost surely, 2^65575109 is an apocalyptic number.

It is an amenable number.

65575109 is a deficient number, since it is larger than the sum of its proper divisors (1).

65575109 is an equidigital number, since it uses as much as digits as its factorization.

65575109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47250, while the sum is 38.

The square root of 65575109 is about 8097.8459481519. The cubic root of 65575109 is about 403.2549189970.

The spelling of 65575109 in words is "sixty-five million, five hundred seventy-five thousand, one hundred nine".