9905923 has 8 divisors (see below), whose sum is σ = 10123200. Its totient is φ = 9690408.

The previous prime is 9905921. The next prime is 9905941. The reversal of 9905923 is 3295099.

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 9905923 - 2¹ = 9905921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9905921) 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 7 ways as a sum of consecutive naturals, for example, 22140 + ... + 22582.

It is an arithmetic number, because the mean of its divisors is an integer number (1265400).

Almost surely, 2^9905923 is an apocalyptic number.

9905923 is a deficient number, since it is larger than the sum of its proper divisors (217277).

9905923 is a wasteful number, since it uses less digits than its factorization.

9905923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881.

The product of its (nonzero) digits is 21870, while the sum is 37.

The square root of 9905923 is about 3147.3676302587. The cubic root of 9905923 is about 214.7657300429.

The spelling of 9905923 in words is "nine million, nine hundred five thousand, nine hundred twenty-three".