6838021 has 4 divisors (see below), whose sum is σ = 7004844. Its totient is φ = 6671200.

The previous prime is 6838019. The next prime is 6838033. The reversal of 6838021 is 1208386.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 532900 + 6305121 = 730^2 + 2511^2 .

It is a cyclic number.

It is not a de Polignac number, because 6838021 - 2¹ = 6838019 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6838001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83350 + ... + 83431.

It is an arithmetic number, because the mean of its divisors is an integer number (1751211).

Almost surely, 2^6838021 is an apocalyptic number.

It is an amenable number.

6838021 is a deficient number, since it is larger than the sum of its proper divisors (166823).

6838021 is a wasteful number, since it uses less digits than its factorization.

6838021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166822.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 6838021 is about 2614.9609939730. The cubic root of 6838021 is about 189.8060902560.

The spelling of 6838021 in words is "six million, eight hundred thirty-eight thousand, twenty-one".