727891 has 2 divisors, whose sum is σ = 727892. Its totient is φ = 727890.

The previous prime is 727879. The next prime is 727933. The reversal of 727891 is 198727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 727891 - 2⁷ = 727763 is a prime.

It is not a weakly prime, because it can be changed into another prime (727691) 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, 363945 + 363946.

It is an arithmetic number, because the mean of its divisors is an integer number (363946).

2⁷²⁷⁸⁹¹ is an apocalyptic number.

727891 is a deficient number, since it is larger than the sum of its proper divisors (1).

727891 is an equidigital number, since it uses as much as digits as its factorization.

727891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 34.

The square root of 727891 is about 853.1652829317. The cubic root of 727891 is about 89.9543389780.

The spelling of 727891 in words is "seven hundred twenty-seven thousand, eight hundred ninety-one".