68716393 has 2 divisors, whose sum is σ = 68716394. Its totient is φ = 68716392.

The previous prime is 68716391. The next prime is 68716409. The reversal of 68716393 is 39361786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45319824 + 23396569 = 6732^2 + 4837^2 .

It is a cyclic number.

It is not a de Polignac number, because 68716393 - 2¹ = 68716391 is a prime.

Together with 68716391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68716391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34358196 + 34358197.

It is an arithmetic number, because the mean of its divisors is an integer number (34358197).

Almost surely, 2^68716393 is an apocalyptic number.

It is an amenable number.

68716393 is a deficient number, since it is larger than the sum of its proper divisors (1).

68716393 is an equidigital number, since it uses as much as digits as its factorization.

68716393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 68716393 is about 8289.5351498139. The cubic root of 68716393 is about 409.5938730754.

The spelling of 68716393 in words is "sixty-eight million, seven hundred sixteen thousand, three hundred ninety-three".