647871974 has 16 divisors (see below), whose sum is σ = 985160880. Its totient is φ = 319509600.

The previous prime is 647871971. The next prime is 647872009. The reversal of 647871974 is 479178746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647871971) 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, 48377 + ... + 60299.

It is an arithmetic number, because the mean of its divisors is an integer number (61572555).

Almost surely, 2^647871974 is an apocalyptic number.

647871974 is a deficient number, since it is larger than the sum of its proper divisors (337288906).

647871974 is a wasteful number, since it uses less digits than its factorization.

647871974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12295.

The product of its digits is 2370816, while the sum is 53.

The square root of 647871974 is about 25453.3293303646. The cubic root of 647871974 is about 865.2927490965.

The spelling of 647871974 in words is "six hundred forty-seven million, eight hundred seventy-one thousand, nine hundred seventy-four".