647924 has 12 divisors (see below), whose sum is σ = 1160544. Its totient is φ = 316344.

The previous prime is 647917. The next prime is 647951. The reversal of 647924 is 429746.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

647924 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1712 + ... + 2055.

It is an arithmetic number, because the mean of its divisors is an integer number (96712).

2⁶⁴⁷⁹²⁴ is an apocalyptic number.

It is an amenable number.

647924 is a deficient number, since it is larger than the sum of its proper divisors (512620).

647924 is a wasteful number, since it uses less digits than its factorization.

647924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814 (or 3812 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 647924 is about 804.9372646362. The cubic root of 647924 is about 86.5315910316.

The spelling of 647924 in words is "six hundred forty-seven thousand, nine hundred twenty-four".