6368721 has 8 divisors (see below), whose sum is σ = 8509344. Its totient is φ = 4236960.

The previous prime is 6368711. The next prime is 6368741. The reversal of 6368721 is 1278636.

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

It is not a de Polignac number, because 6368721 - 2⁹ = 6368209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6368711) 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 7 ways as a sum of consecutive naturals, for example, 300 + ... + 3581.

It is an arithmetic number, because the mean of its divisors is an integer number (1063668).

Almost surely, 2^6368721 is an apocalyptic number.

It is an amenable number.

6368721 is a deficient number, since it is larger than the sum of its proper divisors (2140623).

6368721 is a wasteful number, since it uses less digits than its factorization.

6368721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431.

The product of its digits is 12096, while the sum is 33.

The square root of 6368721 is about 2523.6325009795. The cubic root of 6368721 is about 185.3605920461.

The spelling of 6368721 in words is "six million, three hundred sixty-eight thousand, seven hundred twenty-one".