1980784033 has 2 divisors, whose sum is σ = 1980784034. Its totient is φ = 1980784032.

The previous prime is 1980784021. The next prime is 1980784037. The reversal of 1980784033 is 3304870891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1809906849 + 170877184 = 42543^2 + 13072^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980784033 - 2²¹ = 1978686881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1980784037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990392016 + 990392017.

It is an arithmetic number, because the mean of its divisors is an integer number (990392017).

Almost surely, 2^1980784033 is an apocalyptic number.

It is an amenable number.

1980784033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980784033 is an equidigital number, since it uses as much as digits as its factorization.

1980784033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1980784033 is about 44505.9999662967. Note that the first 4 decimals coincide. The cubic root of 1980784033 is about 1255.8729571913.

The spelling of 1980784033 in words is "one billion, nine hundred eighty million, seven hundred eighty-four thousand, thirty-three".