68865689 has 2 divisors, whose sum is σ = 68865690. Its totient is φ = 68865688.

The previous prime is 68865677. The next prime is 68865721. The reversal of 68865689 is 98656886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37112464 + 31753225 = 6092^2 + 5635^2 .

It is a cyclic number.

It is not a de Polignac number, because 68865689 - 2⁴ = 68865673 is a prime.

It is a super-3 number, since 3×68865689³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (68865089) 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, 34432844 + 34432845.

It is an arithmetic number, because the mean of its divisors is an integer number (34432845).

Almost surely, 2^68865689 is an apocalyptic number.

It is an amenable number.

68865689 is a deficient number, since it is larger than the sum of its proper divisors (1).

68865689 is an equidigital number, since it uses as much as digits as its factorization.

68865689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 56.

The square root of 68865689 is about 8298.5353526993. The cubic root of 68865689 is about 409.8902918842.

The spelling of 68865689 in words is "sixty-eight million, eight hundred sixty-five thousand, six hundred eighty-nine".