6687047 has 4 divisors (see below), whose sum is σ = 6867816. Its totient is φ = 6506280.

The previous prime is 6687017. The next prime is 6687049. The reversal of 6687047 is 7407866.

6687047 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 is a cyclic number.

It is not a de Polignac number, because 6687047 - 2⁶ = 6686983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6687047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687049) 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, 90329 + ... + 90402.

It is an arithmetic number, because the mean of its divisors is an integer number (1716954).

Almost surely, 2^6687047 is an apocalyptic number.

6687047 is a deficient number, since it is larger than the sum of its proper divisors (180769).

6687047 is a wasteful number, since it uses less digits than its factorization.

6687047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180768.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 6687047 is about 2585.9325203880. The cubic root of 6687047 is about 188.3987969535.

The spelling of 6687047 in words is "six million, six hundred eighty-seven thousand, forty-seven".