6921338 has 8 divisors (see below), whose sum is σ = 10489332. Its totient is φ = 3424896.

The previous prime is 6921337. The next prime is 6921347. The reversal of 6921338 is 8331296.

It can be written as a sum of positive squares in 2 ways, for example, as 6880129 + 41209 = 2623^2 + 203^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6921337) 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 3 ways as a sum of consecutive naturals, for example, 17645 + ... + 18032.

Almost surely, 2^6921338 is an apocalyptic number.

6921338 is a deficient number, since it is larger than the sum of its proper divisors (3567994).

6921338 is a wasteful number, since it uses less digits than its factorization.

6921338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35776.

The product of its digits is 7776, while the sum is 32.

The square root of 6921338 is about 2630.8435909419. The cubic root of 6921338 is about 190.5738697590.

The spelling of 6921338 in words is "six million, nine hundred twenty-one thousand, three hundred thirty-eight".