1983871 has 2 divisors, whose sum is σ = 1983872. Its totient is φ = 1983870.

The previous prime is 1983859. The next prime is 1983881. The reversal of 1983871 is 1783891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1983871 - 2⁷ = 1983743 is a prime.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1983871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1983851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991935 + 991936.

It is an arithmetic number, because the mean of its divisors is an integer number (991936).

2^1983871 is an apocalyptic number.

1983871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983871 is an equidigital number, since it uses as much as digits as its factorization.

1983871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 37.

The square root of 1983871 is about 1408.4995562655. The cubic root of 1983871 is about 125.6525026623.

The spelling of 1983871 in words is "one million, nine hundred eighty-three thousand, eight hundred seventy-one".