6868721 has 8 divisors (see below), whose sum is σ = 7136640. Its totient is φ = 6605968.

The previous prime is 6868703. The next prime is 6868727. The reversal of 6868721 is 1278686.

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 6868721 - 2¹⁴ = 6852337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6868727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1535 + ... + 4011.

It is an arithmetic number, because the mean of its divisors is an integer number (892080).

Almost surely, 2^6868721 is an apocalyptic number.

It is an amenable number.

6868721 is a deficient number, since it is larger than the sum of its proper divisors (267919).

6868721 is a wasteful number, since it uses less digits than its factorization.

6868721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its digits is 32256, while the sum is 38.

The square root of 6868721 is about 2620.8244885913. The cubic root of 6868721 is about 190.0897175550.

The spelling of 6868721 in words is "six million, eight hundred sixty-eight thousand, seven hundred twenty-one".