843994 has 4 divisors (see below), whose sum is σ = 1265994. Its totient is φ = 421996.

The previous prime is 843911. The next prime is 844001. The reversal of 843994 is 499348.

843994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 744769 + 99225 = 863^2 + 315^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210997 + ... + 211000.

2⁸⁴³⁹⁹⁴ is an apocalyptic number.

843994 is a deficient number, since it is larger than the sum of its proper divisors (422000).

843994 is a wasteful number, since it uses less digits than its factorization.

843994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421999.

The product of its digits is 31104, while the sum is 37.

The square root of 843994 is about 918.6914607201. The cubic root of 843994 is about 94.5031866268.

The spelling of 843994 in words is "eight hundred forty-three thousand, nine hundred ninety-four".