1980673 has 2 divisors, whose sum is σ = 1980674. Its totient is φ = 1980672.

The previous prime is 1980661. The next prime is 1980697. The reversal of 1980673 is 3760891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1979649 + 1024 = 1407^2 + 32^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1980673 is a prime.

1980673 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1980073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990336 + 990337.

It is an arithmetic number, because the mean of its divisors is an integer number (990337).

2^1980673 is an apocalyptic number.

It is an amenable number.

1980673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980673 is an equidigital number, since it uses as much as digits as its factorization.

1980673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1980673 is about 1407.3638477665. The cubic root of 1980673 is about 125.5849490735.

The spelling of 1980673 in words is "one million, nine hundred eighty thousand, six hundred seventy-three".