730891 has 8 divisors (see below), whose sum is σ = 841184. Its totient is φ = 622080.

The previous prime is 730889. The next prime is 730901. The reversal of 730891 is 198037.

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 not a de Polignac number, because 730891 - 2¹ = 730889 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730811) 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, 1081 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (105148).

2⁷³⁰⁸⁹¹ is an apocalyptic number.

730891 is the 541-st heptagonal number.

730891 is a deficient number, since it is larger than the sum of its proper divisors (110293).

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 product of its (nonzero) digits is 1512, while the sum is 28.

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".