6830021 has 4 divisors (see below), whose sum is σ = 7450944. Its totient is φ = 6209100.

The previous prime is 6830009. The next prime is 6830023. The reversal of 6830021 is 1200386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6830021 - 2⁶ = 6829957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6829975 and 6830002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6830023) 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, 310445 + ... + 310466.

It is an arithmetic number, because the mean of its divisors is an integer number (1862736).

Almost surely, 2^6830021 is an apocalyptic number.

It is an amenable number.

6830021 is a deficient number, since it is larger than the sum of its proper divisors (620923).

6830021 is a wasteful number, since it uses less digits than its factorization.

6830021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620922.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 6830021 is about 2613.4308867846. The cubic root of 6830021 is about 189.7320414795.

The spelling of 6830021 in words is "six million, eight hundred thirty thousand, twenty-one".