9981371 has 2 divisors, whose sum is σ = 9981372. Its totient is φ = 9981370.

The previous prime is 9981359. The next prime is 9981373. The reversal of 9981371 is 1731899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9981371 is a prime.

Together with 9981373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9981373) 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, 4990685 + 4990686.

It is an arithmetic number, because the mean of its divisors is an integer number (4990686).

Almost surely, 2^9981371 is an apocalyptic number.

9981371 is a deficient number, since it is larger than the sum of its proper divisors (1).

9981371 is an equidigital number, since it uses as much as digits as its factorization.

9981371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 38.

The square root of 9981371 is about 3159.3307835679. The cubic root of 9981371 is about 215.3096026294.

The spelling of 9981371 in words is "nine million, nine hundred eighty-one thousand, three hundred seventy-one".