7688641369 has 2 divisors, whose sum is σ = 7688641370. Its totient is φ = 7688641368.

The previous prime is 7688641283. The next prime is 7688641393. The reversal of 7688641369 is 9631468867.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7333695769 + 354945600 = 85637^2 + 18840^2 .

It is an emirp because it is prime and its reverse (9631468867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7688641369 - 2⁷ = 7688641241 is a prime.

It is a super-2 number, since 2×7688641369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7688641469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3844320684 + 3844320685.

It is an arithmetic number, because the mean of its divisors is an integer number (3844320685).

Almost surely, 2^7688641369 is an apocalyptic number.

It is an amenable number.

7688641369 is a deficient number, since it is larger than the sum of its proper divisors (1).

7688641369 is an equidigital number, since it uses as much as digits as its factorization.

7688641369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 58.

The square root of 7688641369 is about 87684.8981809297. The cubic root of 7688641369 is about 1973.7093629540.

The spelling of 7688641369 in words is "seven billion, six hundred eighty-eight million, six hundred forty-one thousand, three hundred sixty-nine".