9909471 has 16 divisors (see below), whose sum is σ = 15523200. Its totient is φ = 5543520.

The previous prime is 9909461. The next prime is 9909499. The reversal of 9909471 is 1749099.

It is not a de Polignac number, because 9909471 - 2⁵ = 9909439 is a prime.

It is a super-3 number, since 3×9909471³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9909401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11121 + ... + 11978.

It is an arithmetic number, because the mean of its divisors is an integer number (970200).

Almost surely, 2^9909471 is an apocalyptic number.

9909471 is a deficient number, since it is larger than the sum of its proper divisors (5613729).

9909471 is a wasteful number, since it uses less digits than its factorization.

9909471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23126.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 9909471 is about 3147.9312254241. The cubic root of 9909471 is about 214.7913678307.

The spelling of 9909471 in words is "nine million, nine hundred nine thousand, four hundred seventy-one".