9855623 has 4 divisors (see below), whose sum is σ = 10374360. Its totient is φ = 9336888.

The previous prime is 9855611. The next prime is 9855647. The reversal of 9855623 is 3265589.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9855623 - 2⁴ = 9855607 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 (9855323) 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 3 ways as a sum of consecutive naturals, for example, 259340 + ... + 259377.

It is an arithmetic number, because the mean of its divisors is an integer number (2593590).

Almost surely, 2^9855623 is an apocalyptic number.

9855623 is a deficient number, since it is larger than the sum of its proper divisors (518737).

9855623 is a wasteful number, since it uses less digits than its factorization.

9855623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518736.

The product of its digits is 64800, while the sum is 38.

The square root of 9855623 is about 3139.3666558718. The cubic root of 9855623 is about 214.4016026905.

The spelling of 9855623 in words is "nine million, eight hundred fifty-five thousand, six hundred twenty-three".