609641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-609641 is a prime.
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 609641.
2609641 is an apocalyptic number.
It is an amenable number.
609641 is an equidigital number, since it uses as much as digits as its factorization.
609641 is an evil number, because the sum of its binary digits is even.
The square root of 609641 is about 780.7951075666. The cubic root of 609641 is about 84.7926201748.
The spelling of 609641 in words is "six hundred nine thousand, six hundred forty-one".