68626709 has 2 divisors, whose sum is σ = 68626710. Its totient is φ = 68626708.

The previous prime is 68626703. The next prime is 68626711. The reversal of 68626709 is 90762686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35736484 + 32890225 = 5978^2 + 5735^2 .

It is a cyclic number.

It is not a de Polignac number, because 68626709 - 2¹⁶ = 68561173 is a prime.

Together with 68626711, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68626709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68626703) 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, 34313354 + 34313355.

It is an arithmetic number, because the mean of its divisors is an integer number (34313355).

Almost surely, 2^68626709 is an apocalyptic number.

It is an amenable number.

68626709 is a deficient number, since it is larger than the sum of its proper divisors (1).

68626709 is an equidigital number, since it uses as much as digits as its factorization.

68626709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 68626709 is about 8284.1239126416. The cubic root of 68626709 is about 409.4156040684.

The spelling of 68626709 in words is "sixty-eight million, six hundred twenty-six thousand, seven hundred nine".