68728207 has 2 divisors, whose sum is σ = 68728208. Its totient is φ = 68728206.

The previous prime is 68728199. The next prime is 68728211. The reversal of 68728207 is 70282786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68728207 - 2³ = 68728199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68728207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68728217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34364103 + 34364104.

It is an arithmetic number, because the mean of its divisors is an integer number (34364104).

Almost surely, 2^68728207 is an apocalyptic number.

68728207 is a deficient number, since it is larger than the sum of its proper divisors (1).

68728207 is an equidigital number, since it uses as much as digits as its factorization.

68728207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 68728207 is about 8290.2477043813. The cubic root of 68728207 is about 409.6173447417.

The spelling of 68728207 in words is "sixty-eight million, seven hundred twenty-eight thousand, two hundred seven".