1980231793 has 2 divisors, whose sum is σ = 1980231794. Its totient is φ = 1980231792.

The previous prime is 1980231787. The next prime is 1980231811. The reversal of 1980231793 is 3971320891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1768034304 + 212197489 = 42048^2 + 14567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1980231793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1980231293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990115896 + 990115897.

It is an arithmetic number, because the mean of its divisors is an integer number (990115897).

Almost surely, 2^1980231793 is an apocalyptic number.

It is an amenable number.

1980231793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980231793 is an equidigital number, since it uses as much as digits as its factorization.

1980231793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 1980231793 is about 44499.7954264961. The cubic root of 1980231793 is about 1255.7562344301.

The spelling of 1980231793 in words is "one billion, nine hundred eighty million, two hundred thirty-one thousand, seven hundred ninety-three".