6780047 has 4 divisors (see below), whose sum is σ = 6945456. Its totient is φ = 6614640.

The previous prime is 6780031. The next prime is 6780049. The reversal of 6780047 is 7400876.

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

It is a cyclic number.

It is not a de Polignac number, because 6780047 - 2⁴ = 6780031 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6779995 and 6780022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780049) 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, 82643 + ... + 82724.

It is an arithmetic number, because the mean of its divisors is an integer number (1736364).

Almost surely, 2^6780047 is an apocalyptic number.

6780047 is a deficient number, since it is larger than the sum of its proper divisors (165409).

6780047 is a wasteful number, since it uses less digits than its factorization.

6780047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165408.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 6780047 is about 2603.8523383633. The cubic root of 6780047 is about 189.2681635154.

The spelling of 6780047 in words is "six million, seven hundred eighty thousand, forty-seven".