647573 has 4 divisors (see below), whose sum is σ = 652800. Its totient is φ = 642348.

The previous prime is 647557. The next prime is 647579. The reversal of 647573 is 375746.

647573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 647573 - 2⁴ = 647557 is a prime.

It is a Duffinian number.

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 647573.

It is not an unprimeable number, because it can be changed into a prime (647579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2423 + ... + 2676.

It is an arithmetic number, because the mean of its divisors is an integer number (163200).

2⁶⁴⁷⁵⁷³ is an apocalyptic number.

It is an amenable number.

647573 is a deficient number, since it is larger than the sum of its proper divisors (5227).

647573 is a wasteful number, since it uses less digits than its factorization.

647573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5226.

The product of its digits is 17640, while the sum is 32.

The square root of 647573 is about 804.7192056861. The cubic root of 647573 is about 86.5159626170.

The spelling of 647573 in words is "six hundred forty-seven thousand, five hundred seventy-three".