9909523 has 8 divisors (see below), whose sum is σ = 10808000. Its totient is φ = 9030528.

The previous prime is 9909509. The next prime is 9909533. The reversal of 9909523 is 3259099.

9909523 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-9909523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9909533) 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, 3798 + ... + 5851.

It is an arithmetic number, because the mean of its divisors is an integer number (1351000).

Almost surely, 2^9909523 is an apocalyptic number.

9909523 is a deficient number, since it is larger than the sum of its proper divisors (898477).

9909523 is a wasteful number, since it uses less digits than its factorization.

9909523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9741.

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

The square root of 9909523 is about 3147.9394848059. The cubic root of 9909523 is about 214.7917435363.

The spelling of 9909523 in words is "nine million, nine hundred nine thousand, five hundred twenty-three".