1988843 has 2 divisors, whose sum is σ = 1988844. Its totient is φ = 1988842.

The previous prime is 1988839. The next prime is 1988851. The reversal of 1988843 is 3488891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1988843 - 2² = 1988839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1988843.

It is not a weakly prime, because it can be changed into another prime (1988243) 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 as a sum of consecutive naturals, namely, 994421 + 994422.

It is an arithmetic number, because the mean of its divisors is an integer number (994422).

2^1988843 is an apocalyptic number.

1988843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988843 is an equidigital number, since it uses as much as digits as its factorization.

1988843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 41.

The square root of 1988843 is about 1410.2634505652. The cubic root of 1988843 is about 125.7573856671.

The spelling of 1988843 in words is "one million, nine hundred eighty-eight thousand, eight hundred forty-three".