6386688947 has 8 divisors (see below), whose sum is σ = 6405631680. Its totient is φ = 6367766400.

The previous prime is 6386688943. The next prime is 6386688949. The reversal of 6386688947 is 7498866836.

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

It is a cyclic number.

It is not a de Polignac number, because 6386688947 - 2² = 6386688943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6386688943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 819254 + ... + 827012.

It is an arithmetic number, because the mean of its divisors is an integer number (800703960).

Almost surely, 2^6386688947 is an apocalyptic number.

6386688947 is a deficient number, since it is larger than the sum of its proper divisors (18942733).

6386688947 is a wasteful number, since it uses less digits than its factorization.

6386688947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10093.

The product of its digits is 83607552, while the sum is 65.

The square root of 6386688947 is about 79916.7626158618. The cubic root of 6386688947 is about 1855.3474643057.

The spelling of 6386688947 in words is "six billion, three hundred eighty-six million, six hundred eighty-eight thousand, nine hundred forty-seven".