9888881 has 2 divisors, whose sum is σ = 9888882. Its totient is φ = 9888880.

The previous prime is 9888871. The next prime is 9888887. The reversal of 9888881 is 1888889.

9888881 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., 7376656 + 2512225 = 2716^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 9888881 - 2⁶ = 9888817 is a prime.

It is a super-2 number, since 2×9888881² = 195579934864322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (9888887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4944440 + 4944441.

It is an arithmetic number, because the mean of its divisors is an integer number (4944441).

Almost surely, 2^9888881 is an apocalyptic number.

It is an amenable number.

9888881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9888881 is an equidigital number, since it uses as much as digits as its factorization.

9888881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294912, while the sum is 50.

The square root of 9888881 is about 3144.6591230211. The cubic root of 9888881 is about 214.6424994440.

It can be divided in two parts, 988888 and 1, that added together give a palindrome (988889).

The spelling of 9888881 in words is "nine million, eight hundred eighty-eight thousand, eight hundred eighty-one".