6936721 has 8 divisors (see below), whose sum is σ = 7624224. Its totient is φ = 6258720.

The previous prime is 6936719. The next prime is 6936733. The reversal of 6936721 is 1276396.

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 6936721 - 2¹ = 6936719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6936701) 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, 795 + ... + 3808.

It is an arithmetic number, because the mean of its divisors is an integer number (953028).

Almost surely, 2^6936721 is an apocalyptic number.

It is an amenable number.

6936721 is a deficient number, since it is larger than the sum of its proper divisors (687503).

6936721 is a wasteful number, since it uses less digits than its factorization.

6936721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751.

The product of its digits is 13608, while the sum is 34.

The square root of 6936721 is about 2633.7655552459. The cubic root of 6936721 is about 190.7149517601.

The spelling of 6936721 in words is "six million, nine hundred thirty-six thousand, seven hundred twenty-one".