1983143 has 2 divisors, whose sum is σ = 1983144. Its totient is φ = 1983142.

The previous prime is 1983109. The next prime is 1983197. The reversal of 1983143 is 3413891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1983143 - 2⁸ = 1982887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1983103) 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 as a sum of consecutive naturals, namely, 991571 + 991572.

It is an arithmetic number, because the mean of its divisors is an integer number (991572).

2^1983143 is an apocalyptic number.

1983143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983143 is an equidigital number, since it uses as much as digits as its factorization.

1983143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 1983143 is about 1408.2411015164. The cubic root of 1983143 is about 125.6371309952.

The spelling of 1983143 in words is "one million, nine hundred eighty-three thousand, one hundred forty-three".