6781694 has 4 divisors (see below), whose sum is σ = 10172544. Its totient is φ = 3390846.

The previous prime is 6781667. The next prime is 6781699. The reversal of 6781694 is 4961876.

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

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1695422 + ... + 1695425.

It is an arithmetic number, because the mean of its divisors is an integer number (2543136).

Almost surely, 2^6781694 is an apocalyptic number.

6781694 is a deficient number, since it is larger than the sum of its proper divisors (3390850).

6781694 is a wasteful number, since it uses less digits than its factorization.

6781694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390849.

The product of its digits is 72576, while the sum is 41.

The square root of 6781694 is about 2604.1685813326. The cubic root of 6781694 is about 189.2834878648.

The spelling of 6781694 in words is "six million, seven hundred eighty-one thousand, six hundred ninety-four".