843491 has 6 divisors (see below), whose sum is σ = 927276. Its totient is φ = 766700.

The previous prime is 843487. The next prime is 843497. The reversal of 843491 is 194348.

It is not a de Polignac number, because 843491 - 2² = 843487 is a prime.

It is a super-2 number, since 2×843491² = 1422954134162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (843497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3365 + ... + 3606.

It is an arithmetic number, because the mean of its divisors is an integer number (154546).

2⁸⁴³⁴⁹¹ is an apocalyptic number.

843491 is a deficient number, since it is larger than the sum of its proper divisors (83785).

843491 is a wasteful number, since it uses less digits than its factorization.

843491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993 (or 6982 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 843491 is about 918.4176609800. The cubic root of 843491 is about 94.4844090252.

The spelling of 843491 in words is "eight hundred forty-three thousand, four hundred ninety-one".