6984638647 has 8 divisors (see below), whose sum is σ = 7987333536. Its totient is φ = 5983166112.

The previous prime is 6984638641. The next prime is 6984638657. The reversal of 6984638647 is 7468364896.

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

It is a de Polignac number, because none of the positive numbers 2^k-6984638647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6984638641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293308 + ... + 316225.

It is an arithmetic number, because the mean of its divisors is an integer number (998416692).

Almost surely, 2^6984638647 is an apocalyptic number.

6984638647 is a deficient number, since it is larger than the sum of its proper divisors (1002694889).

6984638647 is a wasteful number, since it uses less digits than its factorization.

6984638647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611177.

The product of its digits is 41803776, while the sum is 61.

The square root of 6984638647 is about 83574.1505909572. The cubic root of 6984638647 is about 1911.5308621779.

The spelling of 6984638647 in words is "six billion, nine hundred eighty-four million, six hundred thirty-eight thousand, six hundred forty-seven".