68145071 has 2 divisors, whose sum is σ = 68145072. Its totient is φ = 68145070.

The previous prime is 68145053. The next prime is 68145073. The reversal of 68145071 is 17054186.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68145071 - 2²² = 63950767 is a prime.

Together with 68145073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68145073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34072535 + 34072536.

It is an arithmetic number, because the mean of its divisors is an integer number (34072536).

Almost surely, 2^68145071 is an apocalyptic number.

68145071 is a deficient number, since it is larger than the sum of its proper divisors (1).

68145071 is an equidigital number, since it uses as much as digits as its factorization.

68145071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 68145071 is about 8255.0027861897. The cubic root of 68145071 is about 408.4555637226.

The spelling of 68145071 in words is "sixty-eight million, one hundred forty-five thousand, seventy-one".