7687695689 has 2 divisors, whose sum is σ = 7687695690. Its totient is φ = 7687695688.

The previous prime is 7687695593. The next prime is 7687695731. The reversal of 7687695689 is 9865967867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4821913600 + 2865782089 = 69440^2 + 53533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7687695689 is a prime.

It is not a weakly prime, because it can be changed into another prime (7680695689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3843847844 + 3843847845.

It is an arithmetic number, because the mean of its divisors is an integer number (3843847845).

Almost surely, 2^7687695689 is an apocalyptic number.

It is an amenable number.

7687695689 is a deficient number, since it is larger than the sum of its proper divisors (1).

7687695689 is an equidigital number, since it uses as much as digits as its factorization.

7687695689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 274337280, while the sum is 71.

The square root of 7687695689 is about 87679.5055243812. The cubic root of 7687695689 is about 1973.6284395107.

The spelling of 7687695689 in words is "seven billion, six hundred eighty-seven million, six hundred ninety-five thousand, six hundred eighty-nine".