7985647 has 2 divisors, whose sum is σ = 7985648. Its totient is φ = 7985646.

The previous prime is 7985641. The next prime is 7985657. The reversal of 7985647 is 7465897.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7985647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7985597 and 7985606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7985641) 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, 3992823 + 3992824.

It is an arithmetic number, because the mean of its divisors is an integer number (3992824).

Almost surely, 2^7985647 is an apocalyptic number.

7985647 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985647 is an equidigital number, since it uses as much as digits as its factorization.

7985647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 46.

The square root of 7985647 is about 2825.8887097690. Note that the first 3 decimals coincide. The cubic root of 7985647 is about 199.8803200645.

The spelling of 7985647 in words is "seven million, nine hundred eighty-five thousand, six hundred forty-seven".