7688630281 has 2 divisors, whose sum is σ = 7688630282. Its totient is φ = 7688630280.

The previous prime is 7688630221. The next prime is 7688630297. The reversal of 7688630281 is 1820368867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7367647225 + 320983056 = 85835^2 + 17916^2 .

It is a cyclic number.

It is not a de Polignac number, because 7688630281 - 2⁷ = 7688630153 is a prime.

It is a super-2 number, since 2×7688630281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7688630221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3844315140 + 3844315141.

It is an arithmetic number, because the mean of its divisors is an integer number (3844315141).

Almost surely, 2^7688630281 is an apocalyptic number.

It is an amenable number.

7688630281 is a deficient number, since it is larger than the sum of its proper divisors (1).

7688630281 is an equidigital number, since it uses as much as digits as its factorization.

7688630281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 7688630281 is about 87684.8349545119. The cubic root of 7688630281 is about 1973.7084141734.

The spelling of 7688630281 in words is "seven billion, six hundred eighty-eight million, six hundred thirty thousand, two hundred eighty-one".