68865617 has 2 divisors, whose sum is σ = 68865618. Its totient is φ = 68865616.

The previous prime is 68865571. The next prime is 68865647. The reversal of 68865617 is 71656886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67305616 + 1560001 = 8204^2 + 1249^2 .

It is a cyclic number.

It is not a de Polignac number, because 68865617 - 2⁶ = 68865553 is a prime.

It is not a weakly prime, because it can be changed into another prime (68865647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34432808 + 34432809.

It is an arithmetic number, because the mean of its divisors is an integer number (34432809).

Almost surely, 2^68865617 is an apocalyptic number.

It is an amenable number.

68865617 is a deficient number, since it is larger than the sum of its proper divisors (1).

68865617 is an equidigital number, since it uses as much as digits as its factorization.

68865617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 68865617 is about 8298.5310145832. The cubic root of 68865617 is about 409.8901490355.

The spelling of 68865617 in words is "sixty-eight million, eight hundred sixty-five thousand, six hundred seventeen".