68442589 has 2 divisors, whose sum is σ = 68442590. Its totient is φ = 68442588.

The previous prime is 68442587. The next prime is 68442599. The reversal of 68442589 is 98524486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37417689 + 31024900 = 6117^2 + 5570^2 .

It is a cyclic number.

It is not a de Polignac number, because 68442589 - 2¹ = 68442587 is a prime.

Together with 68442587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68442587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34221294 + 34221295.

It is an arithmetic number, because the mean of its divisors is an integer number (34221295).

Almost surely, 2^68442589 is an apocalyptic number.

It is an amenable number.

68442589 is a deficient number, since it is larger than the sum of its proper divisors (1).

68442589 is an equidigital number, since it uses as much as digits as its factorization.

68442589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 46.

The square root of 68442589 is about 8273.0036262533. The cubic root of 68442589 is about 409.0491329716.

The spelling of 68442589 in words is "sixty-eight million, four hundred forty-two thousand, five hundred eighty-nine".