68216289 has 16 divisors (see below), whose sum is σ = 96902400. Its totient is φ = 42561936.

The previous prime is 68216279. The next prime is 68216293. The reversal of 68216289 is 98261286.

It is not a de Polignac number, because 68216289 - 2²⁰ = 67167713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68216289.

It is not an unprimeable number, because it can be changed into a prime (68216209) 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 in 15 ways as a sum of consecutive naturals, for example, 2479 + ... + 11940.

It is an arithmetic number, because the mean of its divisors is an integer number (6056400).

Almost surely, 2^68216289 is an apocalyptic number.

It is an amenable number.

68216289 is a deficient number, since it is larger than the sum of its proper divisors (28686111).

68216289 is a wasteful number, since it uses less digits than its factorization.

68216289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14524.

The product of its digits is 82944, while the sum is 42.

The square root of 68216289 is about 8259.3152863903. The cubic root of 68216289 is about 408.5978056587.

The spelling of 68216289 in words is "sixty-eight million, two hundred sixteen thousand, two hundred eighty-nine".