9997471 has 4 divisors (see below), whose sum is σ = 10906344. Its totient is φ = 9088600.

The previous prime is 9997451. The next prime is 9997483. The reversal of 9997471 is 1747999.

9997471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1747999 = 11 ⋅158909.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9997471 is a prime.

It is a super-3 number, since 3×9997471³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454420 + ... + 454441.

It is an arithmetic number, because the mean of its divisors is an integer number (2726586).

Almost surely, 2^9997471 is an apocalyptic number.

9997471 is a deficient number, since it is larger than the sum of its proper divisors (908873).

9997471 is a wasteful number, since it uses less digits than its factorization.

9997471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908872.

The product of its digits is 142884, while the sum is 46.

The square root of 9997471 is about 3161.8777648733. The cubic root of 9997471 is about 215.4253055875.

The spelling of 9997471 in words is "nine million, nine hundred ninety-seven thousand, four hundred seventy-one".