9816971 has 2 divisors, whose sum is σ = 9816972. Its totient is φ = 9816970.

The previous prime is 9816959. The next prime is 9816997. The reversal of 9816971 is 1796189.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1796189) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9816971 is a prime.

It is a super-2 number, since 2×9816971² = 192745839229682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9816941) 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, 4908485 + 4908486.

It is an arithmetic number, because the mean of its divisors is an integer number (4908486).

Almost surely, 2^9816971 is an apocalyptic number.

9816971 is a deficient number, since it is larger than the sum of its proper divisors (1).

9816971 is an equidigital number, since it uses as much as digits as its factorization.

9816971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 41.

The square root of 9816971 is about 3133.2045895536. The cubic root of 9816971 is about 214.1209538379.

The spelling of 9816971 in words is "nine million, eight hundred sixteen thousand, nine hundred seventy-one".