9881239 has 2 divisors, whose sum is σ = 9881240. Its totient is φ = 9881238.

The previous prime is 9881231. The next prime is 9881269. The reversal of 9881239 is 9321889.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9881239 - 2³ = 9881231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9881231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4940619 + 4940620.

It is an arithmetic number, because the mean of its divisors is an integer number (4940620).

Almost surely, 2^9881239 is an apocalyptic number.

9881239 is a deficient number, since it is larger than the sum of its proper divisors (1).

9881239 is an equidigital number, since it uses as much as digits as its factorization.

9881239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 9881239 is about 3143.4438121271. The cubic root of 9881239 is about 214.5871942079.

The spelling of 9881239 in words is "nine million, eight hundred eighty-one thousand, two hundred thirty-nine".