1980803 has 4 divisors (see below), whose sum is σ = 2160888. Its totient is φ = 1800720.

The previous prime is 1980791. The next prime is 1980809. The reversal of 1980803 is 3080891.

It is a happy number.

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 1980803 - 2¹⁰ = 1979779 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1980809) 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 3 ways as a sum of consecutive naturals, for example, 90026 + ... + 90047.

It is an arithmetic number, because the mean of its divisors is an integer number (540222).

2^1980803 is an apocalyptic number.

1980803 is a deficient number, since it is larger than the sum of its proper divisors (180085).

1980803 is a wasteful number, since it uses less digits than its factorization.

1980803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180084.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1980803 is about 1407.4100326486. The cubic root of 1980803 is about 125.5876965716.

The spelling of 1980803 in words is "one million, nine hundred eighty thousand, eight hundred three".