982111993 has 2 divisors, whose sum is σ = 982111994. Its totient is φ = 982111992.

The previous prime is 982111987. The next prime is 982112111. The reversal of 982111993 is 399111289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 772673209 + 209438784 = 27797^2 + 14472^2 .

It is an emirp because it is prime and its reverse (399111289) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-982111993 is a prime.

It is not a weakly prime, because it can be changed into another prime (982111903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491055996 + 491055997.

It is an arithmetic number, because the mean of its divisors is an integer number (491055997).

Almost surely, 2^982111993 is an apocalyptic number.

It is an amenable number.

982111993 is a deficient number, since it is larger than the sum of its proper divisors (1).

982111993 is an equidigital number, since it uses as much as digits as its factorization.

982111993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 43.

The square root of 982111993 is about 31338.6661011601. Note that the first 3 decimals coincide. The cubic root of 982111993 is about 994.0014199867.

The spelling of 982111993 in words is "nine hundred eighty-two million, one hundred eleven thousand, nine hundred ninety-three".