68724419173 has 2 divisors, whose sum is σ = 68724419174. Its totient is φ = 68724419172.

The previous prime is 68724419149. The next prime is 68724419191. The reversal of 68724419173 is 37191442786.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52779548644 + 15944870529 = 229738^2 + 126273^2 .

It is a cyclic number.

It is not a de Polignac number, because 68724419173 - 2³³ = 60134484581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68724419173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68724419123) 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, 34362209586 + 34362209587.

It is an arithmetic number, because the mean of its divisors is an integer number (34362209587).

Almost surely, 2^68724419173 is an apocalyptic number.

It is an amenable number.

68724419173 is a deficient number, since it is larger than the sum of its proper divisors (1).

68724419173 is an equidigital number, since it uses as much as digits as its factorization.

68724419173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The spelling of 68724419173 in words is "sixty-eight billion, seven hundred twenty-four million, four hundred nineteen thousand, one hundred seventy-three".