68140817 has 2 divisors, whose sum is σ = 68140818. Its totient is φ = 68140816.

The previous prime is 68140801. The next prime is 68140823. The reversal of 68140817 is 71804186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45711121 + 22429696 = 6761^2 + 4736^2 .

It is a cyclic number.

It is not a de Polignac number, because 68140817 - 2⁴ = 68140801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68140837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34070408 + 34070409.

It is an arithmetic number, because the mean of its divisors is an integer number (34070409).

Almost surely, 2^68140817 is an apocalyptic number.

It is an amenable number.

68140817 is a deficient number, since it is larger than the sum of its proper divisors (1).

68140817 is an equidigital number, since it uses as much as digits as its factorization.

68140817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 68140817 is about 8254.7451202324. The cubic root of 68140817 is about 408.4470641784.

The spelling of 68140817 in words is "sixty-eight million, one hundred forty thousand, eight hundred seventeen".