68743321 has 4 divisors (see below), whose sum is σ = 68760612. Its totient is φ = 68726032.

The previous prime is 68743309. The next prime is 68743391. The reversal of 68743321 is 12334786.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43099225 + 25644096 = 6565^2 + 5064^2 .

It is a cyclic number.

It is not a de Polignac number, because 68743321 - 2⁹ = 68742809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68743391) 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 3 ways as a sum of consecutive naturals, for example, 651 + ... + 11743.

It is an arithmetic number, because the mean of its divisors is an integer number (17190153).

Almost surely, 2^68743321 is an apocalyptic number.

It is an amenable number.

68743321 is a deficient number, since it is larger than the sum of its proper divisors (17291).

68743321 is a wasteful number, since it uses less digits than its factorization.

68743321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17290.

The product of its digits is 24192, while the sum is 34.

The square root of 68743321 is about 8291.1592072520. The cubic root of 68743321 is about 409.6473688179.

The spelling of 68743321 in words is "sixty-eight million, seven hundred forty-three thousand, three hundred twenty-one".