7686869 has 2 divisors, whose sum is σ = 7686870. Its totient is φ = 7686868.

The previous prime is 7686863. The next prime is 7686871. The reversal of 7686869 is 9686867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7086244 + 600625 = 2662^2 + 775^2 .

It is an emirp because it is prime and its reverse (9686867) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7686869 is a prime.

It is a super-2 number, since 2×7686869² = 118175910046322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 7686871, it forms a pair of twin primes.

It is a Chen 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 (7686863) 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, 3843434 + 3843435.

It is an arithmetic number, because the mean of its divisors is an integer number (3843435).

Almost surely, 2^7686869 is an apocalyptic number.

It is an amenable number.

7686869 is a deficient number, since it is larger than the sum of its proper divisors (1).

7686869 is an equidigital number, since it uses as much as digits as its factorization.

7686869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 7686869 is about 2772.5203335593. The cubic root of 7686869 is about 197.3557692893.

The spelling of 7686869 in words is "seven million, six hundred eighty-six thousand, eight hundred sixty-nine".