728843 has 2 divisors, whose sum is σ = 728844. Its totient is φ = 728842.

The previous prime is 728839. The next prime is 728851. The reversal of 728843 is 348827.

It is a weak prime.

It is an emirp because it is prime and its reverse (348827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728843 - 2² = 728839 is a prime.

It is not a weakly prime, because it can be changed into another prime (728813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364421 + 364422.

It is an arithmetic number, because the mean of its divisors is an integer number (364422).

2⁷²⁸⁸⁴³ is an apocalyptic number.

728843 is a deficient number, since it is larger than the sum of its proper divisors (1).

728843 is an equidigital number, since it uses as much as digits as its factorization.

728843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 32.

The square root of 728843 is about 853.7230229998. The cubic root of 728843 is about 89.9935386308.

The spelling of 728843 in words is "seven hundred twenty-eight thousand, eight hundred forty-three".