6783945 has 16 divisors (see below), whose sum is σ = 12405120. Its totient is φ = 3101184.

The previous prime is 6783937. The next prime is 6783949. The reversal of 6783945 is 5493876.

It is a happy number.

6783945 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6783945 - 2³ = 6783937 is a prime.

It is a Curzon number.

6783945 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6783897 and 6783906.

It is not an unprimeable number, because it can be changed into a prime (6783949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32200 + ... + 32409.

It is an arithmetic number, because the mean of its divisors is an integer number (775320).

Almost surely, 2^6783945 is an apocalyptic number.

It is an amenable number.

6783945 is a deficient number, since it is larger than the sum of its proper divisors (5621175).

6783945 is a wasteful number, since it uses less digits than its factorization.

6783945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64624.

The product of its digits is 181440, while the sum is 42.

The square root of 6783945 is about 2604.6007371572. The cubic root of 6783945 is about 189.3044280605.

The spelling of 6783945 in words is "six million, seven hundred eighty-three thousand, nine hundred forty-five".