647959747 has 8 divisors (see below), whose sum is σ = 658218512. Its totient is φ = 637718400.

The previous prime is 647959691. The next prime is 647959757. The reversal of 647959747 is 747959746.

647959747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 647959747 - 2⁷ = 647959619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647959691 and 647959700.

It is not an unprimeable number, because it can be changed into a prime (647959757) 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, 84847 + ... + 92167.

It is an arithmetic number, because the mean of its divisors is an integer number (82277314).

Almost surely, 2^647959747 is an apocalyptic number.

647959747 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

647959747 is a deficient number, since it is larger than the sum of its proper divisors (10258765).

647959747 is a wasteful number, since it uses less digits than its factorization.

647959747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8709.

The product of its digits is 13335840, while the sum is 58.

The square root of 647959747 is about 25455.0534668462. The cubic root of 647959747 is about 865.3318236431.

Subtracting 647959747 from its reverse (747959746), we obtain a palindrome (99999999).

The spelling of 647959747 in words is "six hundred forty-seven million, nine hundred fifty-nine thousand, seven hundred forty-seven".