68729273 has 2 divisors, whose sum is σ = 68729274. Its totient is φ = 68729272.

The previous prime is 68729257. The next prime is 68729279. The reversal of 68729273 is 37292786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65092624 + 3636649 = 8068^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 68729273 - 2⁴ = 68729257 is a prime.

It is not a weakly prime, because it can be changed into another prime (68729279) 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, 34364636 + 34364637.

It is an arithmetic number, because the mean of its divisors is an integer number (34364637).

Almost surely, 2^68729273 is an apocalyptic number.

It is an amenable number.

68729273 is a deficient number, since it is larger than the sum of its proper divisors (1).

68729273 is an equidigital number, since it uses as much as digits as its factorization.

68729273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 68729273 is about 8290.3119965415. The cubic root of 68729273 is about 409.6194625031.

The spelling of 68729273 in words is "sixty-eight million, seven hundred twenty-nine thousand, two hundred seventy-three".