9855799 has 12 divisors (see below), whose sum is σ = 10652992. Its totient is φ = 9108000.

The previous prime is 9855793. The next prime is 9855817. The reversal of 9855799 is 9975589.

It is not a de Polignac number, because 9855799 - 2¹⁵ = 9823031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855793) 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 11 ways as a sum of consecutive naturals, for example, 16099 + ... + 16699.

Almost surely, 2^9855799 is an apocalyptic number.

9855799 is a deficient number, since it is larger than the sum of its proper divisors (797193).

9855799 is a wasteful number, since it uses less digits than its factorization.

9855799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 655 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 52.

The square root of 9855799 is about 3139.3946868783. The cubic root of 9855799 is about 214.4028789317.

The spelling of 9855799 in words is "nine million, eight hundred fifty-five thousand, seven hundred ninety-nine".