68045489 has 2 divisors, whose sum is σ = 68045490. Its totient is φ = 68045488.

The previous prime is 68045459. The next prime is 68045503. The reversal of 68045489 is 98454086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66699889 + 1345600 = 8167^2 + 1160^2 .

It is a cyclic number.

It is not a de Polignac number, because 68045489 - 2⁸ = 68045233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68045429) 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, 34022744 + 34022745.

It is an arithmetic number, because the mean of its divisors is an integer number (34022745).

Almost surely, 2^68045489 is an apocalyptic number.

It is an amenable number.

68045489 is a deficient number, since it is larger than the sum of its proper divisors (1).

68045489 is an equidigital number, since it uses as much as digits as its factorization.

68045489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 68045489 is about 8248.9689658769. The cubic root of 68045489 is about 408.2565048106.

The spelling of 68045489 in words is "sixty-eight million, forty-five thousand, four hundred eighty-nine".