68305771 has 2 divisors, whose sum is σ = 68305772. Its totient is φ = 68305770.

The previous prime is 68305753. The next prime is 68305777. The reversal of 68305771 is 17750386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68305771 - 2⁵ = 68305739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68305771.

It is not a weakly prime, because it can be changed into another prime (68305777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34152885 + 34152886.

It is an arithmetic number, because the mean of its divisors is an integer number (34152886).

Almost surely, 2^68305771 is an apocalyptic number.

68305771 is a deficient number, since it is larger than the sum of its proper divisors (1).

68305771 is an equidigital number, since it uses as much as digits as its factorization.

68305771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 68305771 is about 8264.7305461219. The cubic root of 68305771 is about 408.7763855568.

The spelling of 68305771 in words is "sixty-eight million, three hundred five thousand, seven hundred seventy-one".