6809938 has 4 divisors (see below), whose sum is σ = 10214910. Its totient is φ = 3404968.

The previous prime is 6809927. The next prime is 6809981. The reversal of 6809938 is 8399086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8399086 = 2 ⋅4199543.

It can be written as a sum of positive squares in only one way, i.e., 5049009 + 1760929 = 2247^2 + 1327^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6809894 and 6809903.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1702483 + ... + 1702486.

Almost surely, 2^6809938 is an apocalyptic number.

6809938 is a deficient number, since it is larger than the sum of its proper divisors (3404972).

6809938 is a wasteful number, since it uses less digits than its factorization.

6809938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404971.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 6809938 is about 2609.5857908871. The cubic root of 6809938 is about 189.5458961567.

Subtracting from 6809938 its sum of digits (43), we obtain a triangular number (6809895 = T₃₆₉₀).

The spelling of 6809938 in words is "six million, eight hundred nine thousand, nine hundred thirty-eight".