9912289 has 4 divisors (see below), whose sum is σ = 9925524. Its totient is φ = 9899056.

The previous prime is 9912277. The next prime is 9912307. The reversal of 9912289 is 9822199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9822199 = 1627 ⋅6037.

It can be written as a sum of positive squares in 2 ways, for example, as 2117025 + 7795264 = 1455^2 + 2792^2 .

It is a cyclic number.

It is not a de Polignac number, because 9912289 - 2⁵ = 9912257 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9912269) 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, 5422 + ... + 7015.

It is an arithmetic number, because the mean of its divisors is an integer number (2481381).

Almost surely, 2^9912289 is an apocalyptic number.

It is an amenable number.

9912289 is a deficient number, since it is larger than the sum of its proper divisors (13235).

9912289 is a wasteful number, since it uses less digits than its factorization.

9912289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13234.

The product of its digits is 23328, while the sum is 40.

The square root of 9912289 is about 3148.3787891548. The cubic root of 9912289 is about 214.8117262907.

It can be divided in two parts, 9912 and 289, that added together give a palindrome (10201).

The spelling of 9912289 in words is "nine million, nine hundred twelve thousand, two hundred eighty-nine".