643327 has 4 divisors (see below), whose sum is σ = 645136. Its totient is φ = 641520.

The previous prime is 643303. The next prime is 643369. The reversal of 643327 is 723346.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 643327 - 2⁷ = 643199 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 4 + 3² + 3⁴ + 2¹⁹ + 7⁶ .

It is a Duffinian number.

643327 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643927) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 174 + ... + 1147.

It is an arithmetic number, because the mean of its divisors is an integer number (161284).

2⁶⁴³³²⁷ is an apocalyptic number.

643327 is a deficient number, since it is larger than the sum of its proper divisors (1809).

643327 is a wasteful number, since it uses less digits than its factorization.

643327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808.

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

The square root of 643327 is about 802.0766796261. The cubic root of 643327 is about 86.3264588409.

The spelling of 643327 in words is "six hundred forty-three thousand, three hundred twenty-seven".