9906423 has 8 divisors (see below), whose sum is σ = 13225200. Its totient is φ = 6595968.

The previous prime is 9906401. The next prime is 9906439. The reversal of 9906423 is 3246099.

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

It is not a de Polignac number, because 9906423 - 2⁹ = 9905911 is a prime.

It is an Ulam number.

9906423 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9906443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1663 + ... + 4751.

It is an arithmetic number, because the mean of its divisors is an integer number (1653150).

Almost surely, 2^9906423 is an apocalyptic number.

9906423 is a deficient number, since it is larger than the sum of its proper divisors (3318777).

9906423 is a wasteful number, since it uses less digits than its factorization.

9906423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 9906423 is about 3147.4470607144. The cubic root of 9906423 is about 214.7693434050.

The spelling of 9906423 in words is "nine million, nine hundred six thousand, four hundred twenty-three".