6930721 has 8 divisors (see below), whose sum is σ = 8000064. Its totient is φ = 5881200.

The previous prime is 6930719. The next prime is 6930727. The reversal of 6930721 is 1270396.

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 6930721 - 2¹ = 6930719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6930721.

It is not an unprimeable number, because it can be changed into a prime (6930727) 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, 4195 + ... + 5608.

It is an arithmetic number, because the mean of its divisors is an integer number (1000008).

Almost surely, 2^6930721 is an apocalyptic number.

It is an amenable number.

6930721 is a deficient number, since it is larger than the sum of its proper divisors (1069343).

6930721 is a wasteful number, since it uses less digits than its factorization.

6930721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9911.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 6930721 is about 2632.6262552820. The cubic root of 6930721 is about 190.6599488372.

The spelling of 6930721 in words is "six million, nine hundred thirty thousand, seven hundred twenty-one".