7648697009 has 2 divisors, whose sum is σ = 7648697010. Its totient is φ = 7648697008.

The previous prime is 7648696997. The next prime is 7648697033. The reversal of 7648697009 is 9007968467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4705960000 + 2942737009 = 68600^2 + 54247^2 .

It is an emirp because it is prime and its reverse (9007968467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7648697009 - 2²⁴ = 7631919793 is a prime.

It is not a weakly prime, because it can be changed into another prime (7648697509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3824348504 + 3824348505.

It is an arithmetic number, because the mean of its divisors is an integer number (3824348505).

Almost surely, 2^7648697009 is an apocalyptic number.

It is an amenable number.

7648697009 is a deficient number, since it is larger than the sum of its proper divisors (1).

7648697009 is an equidigital number, since it uses as much as digits as its factorization.

7648697009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The square root of 7648697009 is about 87456.8294017111. The cubic root of 7648697009 is about 1970.2854601927.

The spelling of 7648697009 in words is "seven billion, six hundred forty-eight million, six hundred ninety-seven thousand, nine".