68817239 has 2 divisors, whose sum is σ = 68817240. Its totient is φ = 68817238.

The previous prime is 68817227. The next prime is 68817257. The reversal of 68817239 is 93271886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68817239 - 2²⁰ = 67768663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68817239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68817269) 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, 34408619 + 34408620.

It is an arithmetic number, because the mean of its divisors is an integer number (34408620).

Almost surely, 2^68817239 is an apocalyptic number.

68817239 is a deficient number, since it is larger than the sum of its proper divisors (1).

68817239 is an equidigital number, since it uses as much as digits as its factorization.

68817239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 68817239 is about 8295.6156492451. The cubic root of 68817239 is about 409.7941441314.

The spelling of 68817239 in words is "sixty-eight million, eight hundred seventeen thousand, two hundred thirty-nine".