68444993 has 8 divisors (see below), whose sum is σ = 70748160. Its totient is φ = 66147840.

The previous prime is 68444977. The next prime is 68445023. The reversal of 68444993 is 39944486.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68444993 - 2⁴ = 68444977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68444903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42896 + ... + 44462.

It is an arithmetic number, because the mean of its divisors is an integer number (8843520).

Almost surely, 2^68444993 is an apocalyptic number.

It is an amenable number.

68444993 is a deficient number, since it is larger than the sum of its proper divisors (2303167).

68444993 is a wasteful number, since it uses less digits than its factorization.

68444993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007.

The product of its digits is 746496, while the sum is 47.

The square root of 68444993 is about 8273.1489168273. The cubic root of 68444993 is about 409.0539221076.

The spelling of 68444993 in words is "sixty-eight million, four hundred forty-four thousand, nine hundred ninety-three".