2194843 has 4 divisors (see below), whose sum is σ = 2508400. Its totient is φ = 1881288.

The previous prime is 2194811. The next prime is 2194847. The reversal of 2194843 is 3484912.

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

It is a cyclic number.

It is not a de Polignac number, because 2194843 - 2⁵ = 2194811 is a prime.

It is the 1482-nd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2194847) by changing a digit.

It is a nontrivial repunit in base 1481.

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 3 ways as a sum of consecutive naturals, for example, 156768 + ... + 156781.

It is an arithmetic number, because the mean of its divisors is an integer number (627100).

2^2194843 is an apocalyptic number.

2194843 is a deficient number, since it is larger than the sum of its proper divisors (313557).

2194843 is an equidigital number, since it uses as much as digits as its factorization.

2194843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313556.

The product of its digits is 6912, while the sum is 31.

The square root of 2194843 is about 1481.5002531218. The cubic root of 2194843 is about 129.9574416904.

It can be divided in two parts, 21 and 94843, that added together give a square (94864 = 308²).

The spelling of 2194843 in words is "two million, one hundred ninety-four thousand, eight hundred forty-three".