68278751 has 2 divisors, whose sum is σ = 68278752. Its totient is φ = 68278750.

The previous prime is 68278747. The next prime is 68278757. The reversal of 68278751 is 15787286.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68278751 - 2² = 68278747 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68278757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34139375 + 34139376.

It is an arithmetic number, because the mean of its divisors is an integer number (34139376).

Almost surely, 2^68278751 is an apocalyptic number.

68278751 is a deficient number, since it is larger than the sum of its proper divisors (1).

68278751 is an equidigital number, since it uses as much as digits as its factorization.

68278751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 44.

The square root of 68278751 is about 8263.0957273893. The cubic root of 68278751 is about 408.7224779856.

The spelling of 68278751 in words is "sixty-eight million, two hundred seventy-eight thousand, seven hundred fifty-one".