6787139 has 8 divisors (see below), whose sum is σ = 7115040. Its totient is φ = 6462016.

The previous prime is 6787133. The next prime is 6787141. The reversal of 6787139 is 9317876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6787139 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 6787096 and 6787105.

It is not an unprimeable number, because it can be changed into a prime (6787133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5639 + ... + 6735.

It is an arithmetic number, because the mean of its divisors is an integer number (889380).

Almost surely, 2^6787139 is an apocalyptic number.

6787139 is a deficient number, since it is larger than the sum of its proper divisors (327901).

6787139 is a wasteful number, since it uses less digits than its factorization.

6787139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389.

The product of its digits is 63504, while the sum is 41.

The square root of 6787139 is about 2605.2138108033. The cubic root of 6787139 is about 189.3341326781.

The spelling of 6787139 in words is "six million, seven hundred eighty-seven thousand, one hundred thirty-nine".