647984463 has 8 divisors (see below), whose sum is σ = 987404928. Its totient is φ = 370276824.

The previous prime is 647984453. The next prime is 647984471. The reversal of 647984463 is 364489746.

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

It is not a de Polignac number, because 647984463 - 2⁵ = 647984431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647984453) 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, 15428181 + ... + 15428222.

It is an arithmetic number, because the mean of its divisors is an integer number (123425616).

Almost surely, 2^647984463 is an apocalyptic number.

647984463 is a deficient number, since it is larger than the sum of its proper divisors (339420465).

647984463 is a wasteful number, since it uses less digits than its factorization.

647984463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30856413.

The product of its digits is 3483648, while the sum is 51.

The square root of 647984463 is about 25455.5389453848. The cubic root of 647984463 is about 865.3428260083.

The spelling of 647984463 in words is "six hundred forty-seven million, nine hundred eighty-four thousand, four hundred sixty-three".