9881289 has 24 divisors (see below), whose sum is σ = 15697344. Its totient is φ = 5940000.

The previous prime is 9881279. The next prime is 9881299. The reversal of 9881289 is 9821889.

9881289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9881279) and next prime (9881299).

It is not a de Polignac number, because 9881289 - 2¹² = 9877193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9881239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14619 + ... + 15279.

It is an arithmetic number, because the mean of its divisors is an integer number (654056).

Almost surely, 2^9881289 is an apocalyptic number.

9881289 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

9881289 is a deficient number, since it is larger than the sum of its proper divisors (5816055).

9881289 is a wasteful number, since it uses less digits than its factorization.

9881289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829 (or 826 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 9881289 is about 3143.4517651779. The cubic root of 9881289 is about 214.5875561511.

The spelling of 9881289 in words is "nine million, eight hundred eighty-one thousand, two hundred eighty-nine".