9905423 has 12 divisors (see below), whose sum is σ = 11050704. Its totient is φ = 8870400.

The previous prime is 9905419. The next prime is 9905431. The reversal of 9905423 is 3245099.

9905423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9905423 - 2² = 9905419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9905423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9905453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8015 + ... + 9167.

It is an arithmetic number, because the mean of its divisors is an integer number (920892).

Almost surely, 2^9905423 is an apocalyptic number.

9905423 is a deficient number, since it is larger than the sum of its proper divisors (1145281).

9905423 is a wasteful number, since it uses less digits than its factorization.

9905423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 9905423 is about 3147.2881977982. The cubic root of 9905423 is about 214.7621165593.

The spelling of 9905423 in words is "nine million, nine hundred five thousand, four hundred twenty-three".