643301 has 2 divisors, whose sum is σ = 643302. Its totient is φ = 643300.

The previous prime is 643273. The next prime is 643303. The reversal of 643301 is 103346.

643301 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638401 + 4900 = 799^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 643301 - 2¹⁴ = 626917 is a prime.

Together with 643303, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 643301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321650 + 321651.

It is an arithmetic number, because the mean of its divisors is an integer number (321651).

2⁶⁴³³⁰¹ is an apocalyptic number.

It is an amenable number.

643301 is a deficient number, since it is larger than the sum of its proper divisors (1).

643301 is an equidigital number, since it uses as much as digits as its factorization.

643301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 643301 is about 802.0604715357. The cubic root of 643301 is about 86.3252958666.

Adding to 643301 its reverse (103346), we get a palindrome (746647).

The spelling of 643301 in words is "six hundred forty-three thousand, three hundred one".