7688861 has 2 divisors, whose sum is σ = 7688862. Its totient is φ = 7688860.

The previous prime is 7688843. The next prime is 7688881. The reversal of 7688861 is 1688867.

7688861 is nontrivially palindromic in base 11.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3960100 + 3728761 = 1990^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 7688861 - 2⁶ = 7688797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7688881) 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, 3844430 + 3844431.

It is an arithmetic number, because the mean of its divisors is an integer number (3844431).

Almost surely, 2^7688861 is an apocalyptic number.

It is an amenable number.

7688861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7688861 is an equidigital number, since it uses as much as digits as its factorization.

7688861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 44.

The square root of 7688861 is about 2772.8795502149. The cubic root of 7688861 is about 197.3728156202.

The spelling of 7688861 in words is "seven million, six hundred eighty-eight thousand, eight hundred sixty-one".