6819939 has 24 divisors (see below), whose sum is σ = 11378432. Its totient is φ = 3855600.

The previous prime is 6819931. The next prime is 6819947. The reversal of 6819939 is 9399186.

It is an interprime number because it is at equal distance from previous prime (6819931) and next prime (6819947).

It is not a de Polignac number, because 6819939 - 2³ = 6819931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6819894 and 6819903.

It is not an unprimeable number, because it can be changed into a prime (6819931) 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, 5964 + ... + 7014.

Almost surely, 2^6819939 is an apocalyptic number.

6819939 is a deficient number, since it is larger than the sum of its proper divisors (4558493).

6819939 is a wasteful number, since it uses less digits than its factorization.

6819939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1164 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 6819939 is about 2611.5012923604. The cubic root of 6819939 is about 189.6386391101.

The spelling of 6819939 in words is "six million, eight hundred nineteen thousand, nine hundred thirty-nine".