1921983 has 16 divisors (see below), whose sum is σ = 3083520. Its totient is φ = 1040256.

The previous prime is 1921981. The next prime is 1922027. The reversal of 1921983 is 3891291.

It is not a de Polignac number, because 1921983 - 2¹ = 1921981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2010 + ... + 2807.

It is an arithmetic number, because the mean of its divisors is an integer number (192720).

2^1921983 is an apocalyptic number.

1921983 is a deficient number, since it is larger than the sum of its proper divisors (1161537).

1921983 is a wasteful number, since it uses less digits than its factorization.

1921983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4846.

The product of its digits is 3888, while the sum is 33.

The square root of 1921983 is about 1386.3560148822. The cubic root of 1921983 is about 124.3320746965.

The spelling of 1921983 in words is "one million, nine hundred twenty-one thousand, nine hundred eighty-three".