9981373 has 2 divisors, whose sum is σ = 9981374. Its totient is φ = 9981372.

The previous prime is 9981371. The next prime is 9981383. The reversal of 9981373 is 3731899.

9981373 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9253764 + 727609 = 3042^2 + 853^2 .

9981373 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 9981373 - 2¹ = 9981371 is a prime.

Together with 9981371, it forms a pair of twin primes.

9981373 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9981371) 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, 4990686 + 4990687.

It is an arithmetic number, because the mean of its divisors is an integer number (4990687).

Almost surely, 2^9981373 is an apocalyptic number.

It is an amenable number.

9981373 is a deficient number, since it is larger than the sum of its proper divisors (1).

9981373 is an equidigital number, since it uses as much as digits as its factorization.

9981373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 9981373 is about 3159.3311000907. The cubic root of 9981373 is about 215.3096170101.

The spelling of 9981373 in words is "nine million, nine hundred eighty-one thousand, three hundred seventy-three".