647644713 has 8 divisors (see below), whose sum is σ = 876415008. Its totient is φ = 425318784.

The previous prime is 647644709. The next prime is 647644717. The reversal of 647644713 is 317446746.

It is an interprime number because it is at equal distance from previous prime (647644709) and next prime (647644717).

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

It is not a de Polignac number, because 647644713 - 2² = 647644709 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647644717) 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, 1610856 + ... + 1611257.

It is an arithmetic number, because the mean of its divisors is an integer number (109551876).

Almost surely, 2^647644713 is an apocalyptic number.

It is an amenable number.

647644713 is a deficient number, since it is larger than the sum of its proper divisors (228770295).

647644713 is a wasteful number, since it uses less digits than its factorization.

647644713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222183.

The product of its digits is 338688, while the sum is 42.

The square root of 647644713 is about 25448.8646701577. The cubic root of 647644713 is about 865.1915612584.

The spelling of 647644713 in words is "six hundred forty-seven million, six hundred forty-four thousand, seven hundred thirteen".