9999423 has 32 divisors (see below), whose sum is σ = 17080320. Its totient is φ = 5663520.

The previous prime is 9999419. The next prime is 9999433. The reversal of 9999423 is 3249999.

9999423 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9999423 - 2² = 9999419 is a prime.

It is a d-powerful number, because it can be written as 9 + 9 + 9 + 9² + 4⁷ + 2²³ + 3¹³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35961 + ... + 36237.

It is an arithmetic number, because the mean of its divisors is an integer number (533760).

Almost surely, 2^9999423 is an apocalyptic number.

9999423 is a deficient number, since it is larger than the sum of its proper divisors (7080897).

9999423 is a wasteful number, since it uses less digits than its factorization.

9999423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 478 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 9999423 is about 3162.1864271418. The cubic root of 9999423 is about 215.4393252274.

The spelling of 9999423 in words is "nine million, nine hundred ninety-nine thousand, four hundred twenty-three".