68641751 has 2 divisors, whose sum is σ = 68641752. Its totient is φ = 68641750.

The previous prime is 68641711. The next prime is 68641777. The reversal of 68641751 is 15714686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68641751 - 2⁶ = 68641687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68641711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34320875 + 34320876.

It is an arithmetic number, because the mean of its divisors is an integer number (34320876).

Almost surely, 2^68641751 is an apocalyptic number.

68641751 is a deficient number, since it is larger than the sum of its proper divisors (1).

68641751 is an equidigital number, since it uses as much as digits as its factorization.

68641751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 68641751 is about 8285.0317440551. The cubic root of 68641751 is about 409.4455145785.

The spelling of 68641751 in words is "sixty-eight million, six hundred forty-one thousand, seven hundred fifty-one".