843881 has 2 divisors, whose sum is σ = 843882. Its totient is φ = 843880.

The previous prime is 843841. The next prime is 843883. The reversal of 843881 is 188348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434281 + 409600 = 659^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 843881 - 2¹⁰ = 842857 is a prime.

It is a super-2 number, since 2×843881² = 1424270284322, which contains 22 as substring.

Together with 843883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (843883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421940 + 421941.

It is an arithmetic number, because the mean of its divisors is an integer number (421941).

2⁸⁴³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

843881 is a deficient number, since it is larger than the sum of its proper divisors (1).

843881 is an equidigital number, since it uses as much as digits as its factorization.

843881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 32.

The square root of 843881 is about 918.6299581442. The cubic root of 843881 is about 94.4989688493.

The spelling of 843881 in words is "eight hundred forty-three thousand, eight hundred eighty-one".