1001983 has 2 divisors, whose sum is σ = 1001984. Its totient is φ = 1001982.

The previous prime is 1001981. The next prime is 1001989. The reversal of 1001983 is 3891001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001983 - 2¹ = 1001981 is a prime.

Together with 1001981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500991 + 500992.

It is an arithmetic number, because the mean of its divisors is an integer number (500992).

2^1001983 is an apocalyptic number.

1001983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001983 is an equidigital number, since it uses as much as digits as its factorization.

1001983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1001983 is about 1000.9910089506. The cubic root of 1001983 is about 100.0660563560.

Adding to 1001983 its reverse (3891001), we get a palindrome (4892984).

The spelling of 1001983 in words is "one million, one thousand, nine hundred eighty-three".