647223 has 8 divisors (see below), whose sum is σ = 866688. Its totient is φ = 429624.

The previous prime is 647219. The next prime is 647261. The reversal of 647223 is 322746.

647223 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 not a de Polignac number, because 647223 - 2² = 647219 is a prime.

It is a super-2 number, since 2×647223² = 837795223458, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 647193 and 647202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086 + ... + 1572.

It is an arithmetic number, because the mean of its divisors is an integer number (108336).

2⁶⁴⁷²²³ is an apocalyptic number.

647223 is a deficient number, since it is larger than the sum of its proper divisors (219465).

647223 is a wasteful number, since it uses less digits than its factorization.

647223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933.

The product of its digits is 2016, while the sum is 24.

The square root of 647223 is about 804.5017091343. The cubic root of 647223 is about 86.5003731036.

Adding to 647223 its reverse (322746), we get a palindrome (969969).

The spelling of 647223 in words is "six hundred forty-seven thousand, two hundred twenty-three".