647323 has 4 divisors (see below), whose sum is σ = 652120. Its totient is φ = 642528.

The previous prime is 647321. The next prime is 647327. The reversal of 647323 is 323746.

647323 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 an emirpimes, since its reverse is a distinct semiprime: 323746 = 2 ⋅161873.

It is a cyclic number.

It is not a de Polignac number, because 647323 - 2¹ = 647321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647321) 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, 2190 + ... + 2467.

It is an arithmetic number, because the mean of its divisors is an integer number (163030).

2⁶⁴⁷³²³ is an apocalyptic number.

647323 is a deficient number, since it is larger than the sum of its proper divisors (4797).

647323 is a wasteful number, since it uses less digits than its factorization.

647323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796.

The product of its digits is 3024, while the sum is 25.

The square root of 647323 is about 804.5638570058. The cubic root of 647323 is about 86.5048278237.

It can be divided in two parts, 647 and 323, that multiplied together give a triangular number (208981 = T₆₄₆).

The spelling of 647323 in words is "six hundred forty-seven thousand, three hundred twenty-three".