68145437 has 2 divisors, whose sum is σ = 68145438. Its totient is φ = 68145436.

The previous prime is 68145433. The next prime is 68145443. The reversal of 68145437 is 73454186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64416676 + 3728761 = 8026^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 68145437 - 2² = 68145433 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68145437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68145433) 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, 34072718 + 34072719.

It is an arithmetic number, because the mean of its divisors is an integer number (34072719).

Almost surely, 2^68145437 is an apocalyptic number.

It is an amenable number.

68145437 is a deficient number, since it is larger than the sum of its proper divisors (1).

68145437 is an equidigital number, since it uses as much as digits as its factorization.

68145437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 68145437 is about 8255.0249545353. The cubic root of 68145437 is about 408.4562949786.

The spelling of 68145437 in words is "sixty-eight million, one hundred forty-five thousand, four hundred thirty-seven".