1980973 has 4 divisors (see below), whose sum is σ = 1988028. Its totient is φ = 1973920.

The previous prime is 1980949. The next prime is 1980983. The reversal of 1980973 is 3790891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1747684 + 233289 = 1322^2 + 483^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980973 - 2⁵ = 1980941 is a prime.

It is a Duffinian number.

1980973 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980983) 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, 3088 + ... + 3673.

It is an arithmetic number, because the mean of its divisors is an integer number (497007).

2^1980973 is an apocalyptic number.

It is an amenable number.

1980973 is a deficient number, since it is larger than the sum of its proper divisors (7055).

1980973 is an equidigital number, since it uses as much as digits as its factorization.

1980973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7054.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1980973 is about 1407.4704259770. The cubic root of 1980973 is about 125.5912892724.

The spelling of 1980973 in words is "one million, nine hundred eighty thousand, nine hundred seventy-three".