9755981 has 2 divisors, whose sum is σ = 9755982. Its totient is φ = 9755980.

The previous prime is 9755971. The next prime is 9755983. The reversal of 9755981 is 1895579.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6300100 + 3455881 = 2510^2 + 1859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9755981 is a prime.

It is a super-2 number, since 2×9755981² = 190358330544722, which contains 22 as substring.

Together with 9755983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9755983) 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, 4877990 + 4877991.

It is an arithmetic number, because the mean of its divisors is an integer number (4877991).

Almost surely, 2^9755981 is an apocalyptic number.

It is an amenable number.

9755981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9755981 is an equidigital number, since it uses as much as digits as its factorization.

9755981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 44.

The square root of 9755981 is about 3123.4565788562. The cubic root of 9755981 is about 213.6766085258.

The spelling of 9755981 in words is "nine million, seven hundred fifty-five thousand, nine hundred eighty-one".