647172982 has 8 divisors (see below), whose sum is σ = 971438400. Its totient is φ = 323360184.

The previous prime is 647172979. The next prime is 647173001. The reversal of 647172982 is 289271746.

647172982 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109557 + ... + 115312.

It is an arithmetic number, because the mean of its divisors is an integer number (121429800).

Almost surely, 2^647172982 is an apocalyptic number.

647172982 is a deficient number, since it is larger than the sum of its proper divisors (324265418).

647172982 is a wasteful number, since it uses less digits than its factorization.

647172982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226310.

The product of its digits is 338688, while the sum is 46.

The square root of 647172982 is about 25439.5947687851. The cubic root of 647172982 is about 864.9814476959.

The spelling of 647172982 in words is "six hundred forty-seven million, one hundred seventy-two thousand, nine hundred eighty-two".