646323 has 32 divisors (see below), whose sum is σ = 1036800. Its totient is φ = 354816.

The previous prime is 646309. The next prime is 646339. The reversal of 646323 is 323646.

It is not a de Polignac number, because 646323 - 2⁴ = 646307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646293 and 646302.

It is not an unprimeable number, because it can be changed into a prime (646423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22273 + ... + 22301.

It is an arithmetic number, because the mean of its divisors is an integer number (32400).

2⁶⁴⁶³²³ is an apocalyptic number.

646323 is a deficient number, since it is larger than the sum of its proper divisors (390477).

646323 is a wasteful number, since it uses less digits than its factorization.

646323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91.

The product of its digits is 2592, while the sum is 24.

The square root of 646323 is about 803.9421620987. The cubic root of 646323 is about 86.4602599593.

Adding to 646323 its reverse (323646), we get a palindrome (969969).

It can be divided in two parts, 646 and 323, that added together give a palindrome (969).

The spelling of 646323 in words is "six hundred forty-six thousand, three hundred twenty-three".