9611881 has 2 divisors, whose sum is σ = 9611882. Its totient is φ = 9611880.

The previous prime is 9611879. The next prime is 9611939. The reversal of 9611881 is 1881169.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9554281 + 57600 = 3091^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 9611881 - 2¹ = 9611879 is a prime.

It is a super-2 number, since 2×9611881² = 184776512716322, which contains 22 as substring.

Together with 9611879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9641881) 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, 4805940 + 4805941.

It is an arithmetic number, because the mean of its divisors is an integer number (4805941).

Almost surely, 2^9611881 is an apocalyptic number.

It is an amenable number.

9611881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9611881 is an equidigital number, since it uses as much as digits as its factorization.

9611881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 34.

The square root of 9611881 is about 3100.3033722525. The cubic root of 9611881 is about 212.6193544032.

The spelling of 9611881 in words is "nine million, six hundred eleven thousand, eight hundred eighty-one".