6788691 has 48 divisors (see below), whose sum is σ = 12556544. Its totient is φ = 3569184.

The previous prime is 6788689. The next prime is 6788699. The reversal of 6788691 is 1968876.

It is a happy number.

It is not a de Polignac number, because 6788691 - 2¹ = 6788689 is a prime.

6788691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6788699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21960 + ... + 22266.

Almost surely, 2^6788691 is an apocalyptic number.

6788691 is a deficient number, since it is larger than the sum of its proper divisors (5767853).

6788691 is a wasteful number, since it uses less digits than its factorization.

6788691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 330 counting only the distinct ones).

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

The square root of 6788691 is about 2605.5116580050. The cubic root of 6788691 is about 189.3485631167.

The spelling of 6788691 in words is "six million, seven hundred eighty-eight thousand, six hundred ninety-one".