68281751 has 2 divisors, whose sum is σ = 68281752. Its totient is φ = 68281750.

The previous prime is 68281723. The next prime is 68281771. The reversal of 68281751 is 15718286.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68281751 - 2¹⁴ = 68265367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68281771) 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, 34140875 + 34140876.

It is an arithmetic number, because the mean of its divisors is an integer number (34140876).

Almost surely, 2^68281751 is an apocalyptic number.

68281751 is a deficient number, since it is larger than the sum of its proper divisors (1).

68281751 is an equidigital number, since it uses as much as digits as its factorization.

68281751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 38.

The square root of 68281751 is about 8263.2772554235. The cubic root of 68281751 is about 408.7284639839.

The spelling of 68281751 in words is "sixty-eight million, two hundred eighty-one thousand, seven hundred fifty-one".