9871481 has 2 divisors, whose sum is σ = 9871482. Its totient is φ = 9871480.

The previous prime is 9871471. The next prime is 9871483. The reversal of 9871481 is 1841789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 11881 = 3140^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 9871481 - 2¹⁸ = 9609337 is a prime.

It is a super-2 number, since 2×9871481² = 194892274266722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 9871483, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9871483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4935740 + 4935741.

It is an arithmetic number, because the mean of its divisors is an integer number (4935741).

Almost surely, 2^9871481 is an apocalyptic number.

It is an amenable number.

9871481 is a deficient number, since it is larger than the sum of its proper divisors (1).

9871481 is an equidigital number, since it uses as much as digits as its factorization.

9871481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 38.

The square root of 9871481 is about 3141.8913093868. The cubic root of 9871481 is about 214.5165339903.

The spelling of 9871481 in words is "nine million, eight hundred seventy-one thousand, four hundred eighty-one".