68390887 has 2 divisors, whose sum is σ = 68390888. Its totient is φ = 68390886.

The previous prime is 68390873. The next prime is 68390909. The reversal of 68390887 is 78809386.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68390887 - 2⁷ = 68390759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68390887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68390807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34195443 + 34195444.

It is an arithmetic number, because the mean of its divisors is an integer number (34195444).

Almost surely, 2^68390887 is an apocalyptic number.

68390887 is a deficient number, since it is larger than the sum of its proper divisors (1).

68390887 is an equidigital number, since it uses as much as digits as its factorization.

68390887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 68390887 is about 8269.8782941468. The cubic root of 68390887 is about 408.9461075206.

The spelling of 68390887 in words is "sixty-eight million, three hundred ninety thousand, eight hundred eighty-seven".