1983403 has 4 divisors (see below), whose sum is σ = 2017080. Its totient is φ = 1949728.

The previous prime is 1983389. The next prime is 1983409. The reversal of 1983403 is 3043891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1983403 - 2⁹ = 1982891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1983409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16750 + ... + 16867.

It is an arithmetic number, because the mean of its divisors is an integer number (504270).

2^1983403 is an apocalyptic number.

1983403 is a deficient number, since it is larger than the sum of its proper divisors (33677).

1983403 is an equidigital number, since it uses as much as digits as its factorization.

1983403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33676.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1983403 is about 1408.3334122288. Note that the first 3 decimals coincide. The cubic root of 1983403 is about 125.6426213081.

The spelling of 1983403 in words is "one million, nine hundred eighty-three thousand, four hundred three".