9855439 has 8 divisors (see below), whose sum is σ = 10903680. Its totient is φ = 8832600.

The previous prime is 9855437. The next prime is 9855451. The reversal of 9855439 is 9345589.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9855439 - 2¹ = 9855437 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 9855395 and 9855404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855437) 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 in 7 ways as a sum of consecutive naturals, for example, 5529 + ... + 7090.

It is an arithmetic number, because the mean of its divisors is an integer number (1362960).

Almost surely, 2^9855439 is an apocalyptic number.

9855439 is a deficient number, since it is larger than the sum of its proper divisors (1048241).

9855439 is a wasteful number, since it uses less digits than its factorization.

9855439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12701.

The product of its digits is 194400, while the sum is 43.

The square root of 9855439 is about 3139.3373504611. The cubic root of 9855439 is about 214.4002684220.

The spelling of 9855439 in words is "nine million, eight hundred fifty-five thousand, four hundred thirty-nine".