643341 has 8 divisors (see below), whose sum is σ = 864864. Its totient is φ = 425360.

The previous prime is 643303. The next prime is 643369. The reversal of 643341 is 143346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 643341 - 2⁷ = 643213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643301) 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, 426 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (108108).

2⁶⁴³³⁴¹ is an apocalyptic number.

It is an amenable number.

643341 is a deficient number, since it is larger than the sum of its proper divisors (221523).

643341 is a wasteful number, since it uses less digits than its factorization.

643341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771.

The product of its digits is 864, while the sum is 21.

The square root of 643341 is about 802.0854069237. The cubic root of 643341 is about 86.3270850448.

Adding to 643341 its reverse (143346), we get a palindrome (786687).

The spelling of 643341 in words is "six hundred forty-three thousand, three hundred forty-one".