6783445 has 4 divisors (see below), whose sum is σ = 8140140. Its totient is φ = 5426752.

The previous prime is 6783433. The next prime is 6783449. The reversal of 6783445 is 5443876.

6783445 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3301489 + 3481956 = 1817^2 + 1866^2 .

It is a cyclic number.

It is not a de Polignac number, because 6783445 - 2⁷ = 6783317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6783449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678340 + ... + 678349.

It is an arithmetic number, because the mean of its divisors is an integer number (2035035).

Almost surely, 2^6783445 is an apocalyptic number.

It is an amenable number.

6783445 is a deficient number, since it is larger than the sum of its proper divisors (1356695).

6783445 is a wasteful number, since it uses less digits than its factorization.

6783445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356694.

The product of its digits is 80640, while the sum is 37.

The square root of 6783445 is about 2604.5047513875. The cubic root of 6783445 is about 189.2997771511.

The spelling of 6783445 in words is "six million, seven hundred eighty-three thousand, four hundred forty-five".