647927 has 8 divisors (see below), whose sum is σ = 756000. Its totient is φ = 555072.

The previous prime is 647917. The next prime is 647951. The reversal of 647927 is 729746.

It is not a de Polignac number, because 647927 - 2¹⁶ = 582391 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647927.

It is not an unprimeable number, because it can be changed into a prime (647917) 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, 602 + ... + 1287.

It is an arithmetic number, because the mean of its divisors is an integer number (94500).

2⁶⁴⁷⁹²⁷ is an apocalyptic number.

647927 is a deficient number, since it is larger than the sum of its proper divisors (108073).

647927 is an equidigital number, since it uses as much as digits as its factorization.

647927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910 (or 1896 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 647927 is about 804.9391281333. The cubic root of 647927 is about 86.5317245835.

The spelling of 647927 in words is "six hundred forty-seven thousand, nine hundred twenty-seven".