6789681 has 24 divisors (see below), whose sum is σ = 10483200. Its totient is φ = 4219776.

The previous prime is 6789637. The next prime is 6789701. The reversal of 6789681 is 1869876.

It is a happy number.

It is not a de Polignac number, because 6789681 - 2⁶ = 6789617 is a prime.

It is a super-4 number, since 4×6789681⁴ (a number of 28 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6789281) 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, 30336 + ... + 30558.

It is an arithmetic number, because the mean of its divisors is an integer number (436800).

Almost surely, 2^6789681 is an apocalyptic number.

It is an amenable number.

6789681 is a deficient number, since it is larger than the sum of its proper divisors (3693519).

6789681 is a wasteful number, since it uses less digits than its factorization.

6789681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 442 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 6789681 is about 2605.7016329580. The cubic root of 6789681 is about 189.3577669513.

The spelling of 6789681 in words is "six million, seven hundred eighty-nine thousand, six hundred eighty-one".