68394817 has 2 divisors, whose sum is σ = 68394818. Its totient is φ = 68394816.

The previous prime is 68394793. The next prime is 68394881. The reversal of 68394817 is 71849386.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39137536 + 29257281 = 6256^2 + 5409^2 .

It is a cyclic number.

It is not a de Polignac number, because 68394817 - 2¹⁹ = 67870529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68394217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34197408 + 34197409.

It is an arithmetic number, because the mean of its divisors is an integer number (34197409).

Almost surely, 2^68394817 is an apocalyptic number.

It is an amenable number.

68394817 is a deficient number, since it is larger than the sum of its proper divisors (1).

68394817 is an equidigital number, since it uses as much as digits as its factorization.

68394817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 68394817 is about 8270.1159000343. The cubic root of 68394817 is about 408.9539405692.

The spelling of 68394817 in words is "sixty-eight million, three hundred ninety-four thousand, eight hundred seventeen".