9128289 has 4 divisors (see below), whose sum is σ = 12171056. Its totient is φ = 6085524.

The previous prime is 9128267. The next prime is 9128297. The reversal of 9128289 is 9828219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9828219 = 3 ⋅3276073.

It is not a de Polignac number, because 9128289 - 2⁹ = 9127777 is a prime.

It is a Duffinian number.

9128289 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9128209) 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, 1521379 + ... + 1521384.

It is an arithmetic number, because the mean of its divisors is an integer number (3042764).

Almost surely, 2^9128289 is an apocalyptic number.

It is an amenable number.

9128289 is a deficient number, since it is larger than the sum of its proper divisors (3042767).

9128289 is a wasteful number, since it uses less digits than its factorization.

9128289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042766.

The product of its digits is 20736, while the sum is 39.

The square root of 9128289 is about 3021.3058435054. The cubic root of 9128289 is about 208.9920633724.

The spelling of 9128289 in words is "nine million, one hundred twenty-eight thousand, two hundred eighty-nine".