647629973 has 16 divisors (see below), whose sum is σ = 676529280. Its totient is φ = 619449600.

The previous prime is 647629963. The next prime is 647629999. The reversal of 647629973 is 379926746.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647629973 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 (647629933) 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 15 ways as a sum of consecutive naturals, for example, 771488 + ... + 772326.

It is an arithmetic number, because the mean of its divisors is an integer number (42283080).

Almost surely, 2^647629973 is an apocalyptic number.

It is an amenable number.

647629973 is a deficient number, since it is larger than the sum of its proper divisors (28899307).

647629973 is a wasteful number, since it uses less digits than its factorization.

647629973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228.

The product of its digits is 3429216, while the sum is 53.

The square root of 647629973 is about 25448.5750681644. The cubic root of 647629973 is about 865.1849974639.

The spelling of 647629973 in words is "six hundred forty-seven million, six hundred twenty-nine thousand, nine hundred seventy-three".