82865647 has 2 divisors, whose sum is σ = 82865648. Its totient is φ = 82865646.

The previous prime is 82865621. The next prime is 82865693. The reversal of 82865647 is 74656828.

It is an a-pointer prime, because the next prime (82865693) can be obtained adding 82865647 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82865647 - 2¹⁵ = 82832879 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 82865597 and 82865606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82865617) 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, 41432823 + 41432824.

It is an arithmetic number, because the mean of its divisors is an integer number (41432824).

Almost surely, 2^82865647 is an apocalyptic number.

82865647 is a deficient number, since it is larger than the sum of its proper divisors (1).

82865647 is an equidigital number, since it uses as much as digits as its factorization.

82865647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 46.

The square root of 82865647 is about 9103.0570139926. The cubic root of 82865647 is about 435.9715756657.

The spelling of 82865647 in words is "eighty-two million, eight hundred sixty-five thousand, six hundred forty-seven".