6873921 has 12 divisors (see below), whose sum is σ = 9981972. Its totient is φ = 4558176.

The previous prime is 6873901. The next prime is 6873929. The reversal of 6873921 is 1293786.

It can be written as a sum of positive squares in 2 ways, for example, as 4730625 + 2143296 = 2175^2 + 1464^2 .

It is not a de Polignac number, because 6873921 - 2¹⁰ = 6872897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6873929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166 + ... + 3711.

It is an arithmetic number, because the mean of its divisors is an integer number (831831).

Almost surely, 2^6873921 is an apocalyptic number.

It is an amenable number.

6873921 is a deficient number, since it is larger than the sum of its proper divisors (3108051).

6873921 is a wasteful number, since it uses less digits than its factorization.

6873921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080 (or 4077 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 6873921 is about 2621.8163551248. The cubic root of 6873921 is about 190.1376749159.

The spelling of 6873921 in words is "six million, eight hundred seventy-three thousand, nine hundred twenty-one".