1983993937 has 2 divisors, whose sum is σ = 1983993938. Its totient is φ = 1983993936.

The previous prime is 1983993887. The next prime is 1983993971. The reversal of 1983993937 is 7393993891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050019216 + 933974721 = 32404^2 + 30561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1983993937 is a prime.

It is a super-3 number, since 3×1983993937³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1983993637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991996968 + 991996969.

It is an arithmetic number, because the mean of its divisors is an integer number (991996969).

Almost surely, 2^1983993937 is an apocalyptic number.

It is an amenable number.

1983993937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983993937 is an equidigital number, since it uses as much as digits as its factorization.

1983993937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9920232, while the sum is 61.

The square root of 1983993937 is about 44542.0468434040. The cubic root of 1983993937 is about 1256.5509809693.

The spelling of 1983993937 in words is "one billion, nine hundred eighty-three million, nine hundred ninety-three thousand, nine hundred thirty-seven".