9981289 has 12 divisors (see below), whose sum is σ = 10796016. Its totient is φ = 9221688.

The previous prime is 9981271. The next prime is 9981317. The reversal of 9981289 is 9821899.

It is a happy number.

It is not a de Polignac number, because 9981289 - 2⁷ = 9981161 is a prime.

It is a super-2 number, since 2×9981289² = 199252260203042, which contains 22 as substring.

It is a Duffinian number.

9981289 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9981229) 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 in 11 ways as a sum of consecutive naturals, for example, 15202 + ... + 15844.

It is an arithmetic number, because the mean of its divisors is an integer number (899668).

Almost surely, 2^9981289 is an apocalyptic number.

It is an amenable number.

9981289 is a deficient number, since it is larger than the sum of its proper divisors (814727).

9981289 is a wasteful number, since it uses less digits than its factorization.

9981289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 705 counting only the distinct ones).

The product of its digits is 93312, while the sum is 46.

The square root of 9981289 is about 3159.3178061094. The cubic root of 9981289 is about 215.3090130165.

The spelling of 9981289 in words is "nine million, nine hundred eighty-one thousand, two hundred eighty-nine".