6447687 has 8 divisors (see below), whose sum is σ = 8685936. Its totient is φ = 4253952.

The previous prime is 6447673. The next prime is 6447691. The reversal of 6447687 is 7867446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6447687 - 2⁴ = 6447671 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6447647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10788 + ... + 11369.

It is an arithmetic number, because the mean of its divisors is an integer number (1085742).

Almost surely, 2^6447687 is an apocalyptic number.

6447687 is a deficient number, since it is larger than the sum of its proper divisors (2238249).

6447687 is a wasteful number, since it uses less digits than its factorization.

6447687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22257.

The product of its digits is 225792, while the sum is 42.

The square root of 6447687 is about 2539.2296075779. The cubic root of 6447687 is about 186.1235449297.

The spelling of 6447687 in words is "six million, four hundred forty-seven thousand, six hundred eighty-seven".