9646981 has 2 divisors, whose sum is σ = 9646982. Its totient is φ = 9646980.

The previous prime is 9646979. The next prime is 9646991. The reversal of 9646981 is 1896469.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9054081 + 592900 = 3009^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 9646981 - 2¹ = 9646979 is a prime.

It is a super-2 number, since 2×9646981² = 186128484828722, which contains 22 as substring.

Together with 9646979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9646951) 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, 4823490 + 4823491.

It is an arithmetic number, because the mean of its divisors is an integer number (4823491).

Almost surely, 2^9646981 is an apocalyptic number.

It is an amenable number.

9646981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9646981 is an equidigital number, since it uses as much as digits as its factorization.

9646981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 9646981 is about 3105.9589501473. The cubic root of 9646981 is about 212.8778495410.

The spelling of 9646981 in words is "nine million, six hundred forty-six thousand, nine hundred eighty-one".