68865647 has 2 divisors, whose sum is σ = 68865648. Its totient is φ = 68865646.

The previous prime is 68865617. The next prime is 68865673. The reversal of 68865647 is 74656886.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68865647 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68865595 and 68865604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68865617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34432823 + 34432824.

It is an arithmetic number, because the mean of its divisors is an integer number (34432824).

Almost surely, 2^68865647 is an apocalyptic number.

68865647 is a deficient number, since it is larger than the sum of its proper divisors (1).

68865647 is an equidigital number, since it uses as much as digits as its factorization.

68865647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 50.

The square root of 68865647 is about 8298.5328221319. The cubic root of 68865647 is about 409.8902085558.

The spelling of 68865647 in words is "sixty-eight million, eight hundred sixty-five thousand, six hundred forty-seven".