730891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a 9-Lehmer number, since φ(730891) divides (730891-1)9.
It is a cyclic number.
It is an Ulam number.
It is a Duffinian number.
It is a congruent number.
2730891 is an apocalyptic number.
730891 is the 541-st heptagonal number.
730891 is a wasteful number, since it uses less digits than its factorization.
730891 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 741.
The square root of 730891 is about 854.9216338355. The cubic root of 730891 is about 90.0777517403.
The spelling of 730891 in words is "seven hundred thirty thousand, eight hundred ninety-one".