647934 has 16 divisors (see below), whose sum is σ = 1481088. Its totient is φ = 185112.

The previous prime is 647917. The next prime is 647951. The reversal of 647934 is 439746.

It is an interprime number because it is at equal distance from previous prime (647917) and next prime (647951).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 647895 and 647904.

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 647934.

It is an unprimeable number.

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, 7672 + ... + 7755.

It is an arithmetic number, because the mean of its divisors is an integer number (92568).

2⁶⁴⁷⁹³⁴ is an apocalyptic number.

647934 is an abundant number, since it is smaller than the sum of its proper divisors (833154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647934 is a wasteful number, since it uses less digits than its factorization.

647934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15439.

The product of its digits is 18144, while the sum is 33.

The square root of 647934 is about 804.9434762764. The cubic root of 647934 is about 86.5320362029.

The spelling of 647934 in words is "six hundred forty-seven thousand, nine hundred thirty-four".