It is a happy number.
858993459 is nontrivially palindromic in base 2, base 4 and base 16.
It is a 29-Lehmer number, since φ(858993459) divides (858993459-1)29.
It is a cyclic number.
858993459 is an undulating number in base 4.
858993459 is a nontrivial repdigit in base 16.
It is a plaindrome in base 16.
It is a nialpdrome in base 16.
It is a zygodrome in base 2 and base 16.
In principle, a polygon with 858993459 sides can be constructed with ruler and compass.
Almost surely, 2858993459 is an apocalyptic number.
858993459 is a wasteful number, since it uses less digits than its factorization.
858993459 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 65814.
The square root of 858993459 is about 29308.5901912733. The cubic root of 858993459 is about 950.5973930501.
The spelling of 858993459 in words is "eight hundred fifty-eight million, nine hundred ninety-three thousand, four hundred fifty-nine".