63984671 has 4 divisors (see below), whose sum is σ = 64035600. Its totient is φ = 63933744.

The previous prime is 63984667. The next prime is 63984673. The reversal of 63984671 is 17648936.

63984671 is nontrivially palindromic in base 4.

63984671 is digitally balanced in base 2, 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 63984671 - 2² = 63984667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63984673) 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 3 ways as a sum of consecutive naturals, for example, 23531 + ... + 26108.

It is an arithmetic number, because the mean of its divisors is an integer number (16008900).

Almost surely, 2^63984671 is an apocalyptic number.

63984671 is a deficient number, since it is larger than the sum of its proper divisors (50929).

63984671 is a wasteful number, since it uses less digits than its factorization.

63984671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50928.

The product of its digits is 217728, while the sum is 44.

The square root of 63984671 is about 7999.0418801254. The cubic root of 63984671 is about 399.9680620333.

The spelling of 63984671 in words is "sixty-three million, nine hundred eighty-four thousand, six hundred seventy-one".