1980743 has 2 divisors, whose sum is σ = 1980744. Its totient is φ = 1980742.

The previous prime is 1980707. The next prime is 1980749. The reversal of 1980743 is 3470891.

It is a strong prime.

It is an emirp because it is prime and its reverse (3470891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1980743 - 2¹² = 1976647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990371 + 990372.

It is an arithmetic number, because the mean of its divisors is an integer number (990372).

2^1980743 is an apocalyptic number.

1980743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980743 is an equidigital number, since it uses as much as digits as its factorization.

1980743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1980743 is about 1407.3887167375. The cubic root of 1980743 is about 125.5864285105.

The spelling of 1980743 in words is "one million, nine hundred eighty thousand, seven hundred forty-three".