1980784037 has 2 divisors, whose sum is σ = 1980784038. Its totient is φ = 1980784036.

The previous prime is 1980784033. The next prime is 1980784073. The reversal of 1980784037 is 7304870891.

It is a Cunningham number, because it is equal to 44506²+1.

Together with next prime (1980784073) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1980784036 + 1 = 44506^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980784037 - 2² = 1980784033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1980783982 and 1980784000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980784033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990392018 + 990392019.

It is an arithmetic number, because the mean of its divisors is an integer number (990392019).

Almost surely, 2^1980784037 is an apocalyptic number.

It is an amenable number.

1980784037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980784037 is an equidigital number, since it uses as much as digits as its factorization.

1980784037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 1980784037 is about 44506.0000112344. Note that the first 4 decimals coincide. The cubic root of 1980784037 is about 1255.8729580366.

The spelling of 1980784037 in words is "one billion, nine hundred eighty million, seven hundred eighty-four thousand, thirty-seven".