9810881 has 2 divisors, whose sum is σ = 9810882. Its totient is φ = 9810880.

The previous prime is 9810863. The next prime is 9810893. The reversal of 9810881 is 1880189.

9810881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6713281 + 3097600 = 2591^2 + 1760^2 .

It is an emirp because it is prime and its reverse (1880189) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9810881 is a prime.

It is a super-2 number, since 2×9810881² = 192506771992322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9810181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4905440 + 4905441.

It is an arithmetic number, because the mean of its divisors is an integer number (4905441).

Almost surely, 2^9810881 is an apocalyptic number.

It is an amenable number.

9810881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9810881 is an equidigital number, since it uses as much as digits as its factorization.

9810881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 9810881 is about 3132.2325903419. The cubic root of 9810881 is about 214.0766677287.

It can be divided in two parts, 98108 and 81, that added together give a palindrome (98189).

The spelling of 9810881 in words is "nine million, eight hundred ten thousand, eight hundred eighty-one".