65507009 has 2 divisors, whose sum is σ = 65507010. Its totient is φ = 65507008.

The previous prime is 65506997. The next prime is 65507011. The reversal of 65507009 is 90070556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50452609 + 15054400 = 7103^2 + 3880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65507009 is a prime.

Together with 65507011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65507609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32753504 + 32753505.

It is an arithmetic number, because the mean of its divisors is an integer number (32753505).

Almost surely, 2^65507009 is an apocalyptic number.

It is an amenable number.

65507009 is a deficient number, since it is larger than the sum of its proper divisors (1).

65507009 is an equidigital number, since it uses as much as digits as its factorization.

65507009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 65507009 is about 8093.6400340020. The cubic root of 65507009 is about 403.1152767240.

The spelling of 65507009 in words is "sixty-five million, five hundred seven thousand, nine".