7065712009 has 2 divisors, whose sum is σ = 7065712010. Its totient is φ = 7065712008.

The previous prime is 7065711979. The next prime is 7065712019. The reversal of 7065712009 is 9002175607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6775759225 + 289952784 = 82315^2 + 17028^2 .

It is a cyclic number.

It is not a de Polignac number, because 7065712009 - 2⁷ = 7065711881 is a prime.

It is not a weakly prime, because it can be changed into another prime (7065712019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3532856004 + 3532856005.

It is an arithmetic number, because the mean of its divisors is an integer number (3532856005).

Almost surely, 2^7065712009 is an apocalyptic number.

It is an amenable number.

7065712009 is a deficient number, since it is larger than the sum of its proper divisors (1).

7065712009 is an equidigital number, since it uses as much as digits as its factorization.

7065712009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 7065712009 is about 84057.7896985163. The cubic root of 7065712009 is about 1918.8983850783.

The spelling of 7065712009 in words is "seven billion, sixty-five million, seven hundred twelve thousand, nine".