1921683 has 8 divisors (see below), whose sum is σ = 2604496. Its totient is φ = 1260000.

The previous prime is 1921681. The next prime is 1921687. The reversal of 1921683 is 3861291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1921683 - 2¹ = 1921681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1921683.

It is not an unprimeable number, because it can be changed into a prime (1921681) 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 in 7 ways as a sum of consecutive naturals, for example, 5068 + ... + 5433.

It is an arithmetic number, because the mean of its divisors is an integer number (325562).

2^1921683 is an apocalyptic number.

1921683 is a deficient number, since it is larger than the sum of its proper divisors (682813).

1921683 is a wasteful number, since it uses less digits than its factorization.

1921683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565.

The product of its digits is 2592, while the sum is 30.

The square root of 1921683 is about 1386.2478133436. The cubic root of 1921683 is about 124.3256054122.

The spelling of 1921683 in words is "one million, nine hundred twenty-one thousand, six hundred eighty-three".