6821694 has 48 divisors (see below), whose sum is σ = 16308864. Its totient is φ = 2043600.

The previous prime is 6821693. The next prime is 6821701. The reversal of 6821694 is 4961286.

6821694 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6821693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25807 + ... + 26069.

It is an arithmetic number, because the mean of its divisors is an integer number (339768).

Almost surely, 2^6821694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6821694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8154432).

6821694 is an abundant number, since it is smaller than the sum of its proper divisors (9487170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6821694 is a wasteful number, since it uses less digits than its factorization.

6821694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 410 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 6821694 is about 2611.8372843652. The cubic root of 6821694 is about 189.6549045179.

The spelling of 6821694 in words is "six million, eight hundred twenty-one thousand, six hundred ninety-four".