1681983 has 12 divisors (see below), whose sum is σ = 2495688. Its totient is φ = 1090800.

The previous prime is 1681973. The next prime is 1681991. The reversal of 1681983 is 3891861.

It is not a de Polignac number, because 1681983 - 2¹² = 1677887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681903) 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 in 11 ways as a sum of consecutive naturals, for example, 2193 + ... + 2858.

It is an arithmetic number, because the mean of its divisors is an integer number (207974).

2^1681983 is an apocalyptic number.

1681983 is a deficient number, since it is larger than the sum of its proper divisors (813705).

1681983 is a wasteful number, since it uses less digits than its factorization.

1681983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094 (or 5091 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1681983 is about 1296.9128729410. The cubic root of 1681983 is about 118.9251936693.

The spelling of 1681983 in words is "one million, six hundred eighty-one thousand, nine hundred eighty-three".