843481681 has 8 divisors (see below), whose sum is σ = 966842240. Its totient is φ = 720836928.

The previous prime is 843481663. The next prime is 843481739. The reversal of 843481681 is 186184348.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 843481681 - 2¹⁷ = 843350609 is a prime.

It is a super-2 number, since 2×843481681² = 1422922692365171522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (843481631) 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 in 7 ways as a sum of consecutive naturals, for example, 176421 + ... + 181138.

It is an arithmetic number, because the mean of its divisors is an integer number (120855280).

Almost surely, 2^843481681 is an apocalyptic number.

It is an amenable number.

843481681 is a deficient number, since it is larger than the sum of its proper divisors (123360559).

843481681 is a wasteful number, since it uses less digits than its factorization.

843481681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357903.

The product of its digits is 147456, while the sum is 43.

The square root of 843481681 is about 29042.7560847796. The cubic root of 843481681 is about 944.8406106514.

The spelling of 843481681 in words is "eight hundred forty-three million, four hundred eighty-one thousand, six hundred eighty-one".