7868647 has 2 divisors, whose sum is σ = 7868648. Its totient is φ = 7868646.

The previous prime is 7868633. The next prime is 7868677. The reversal of 7868647 is 7468687.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7868647 is a prime.

It is a super-2 number, since 2×7868647² = 123831211221218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7868597 and 7868606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7868617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3934323 + 3934324.

It is an arithmetic number, because the mean of its divisors is an integer number (3934324).

Almost surely, 2^7868647 is an apocalyptic number.

7868647 is a deficient number, since it is larger than the sum of its proper divisors (1).

7868647 is an equidigital number, since it uses as much as digits as its factorization.

7868647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 46.

The square root of 7868647 is about 2805.1108712491. The cubic root of 7868647 is about 198.8993455774.

It can be divided in two parts, 7868 and 647, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 7868647 in words is "seven million, eight hundred sixty-eight thousand, six hundred forty-seven".