9121009 has 2 divisors, whose sum is σ = 9121010. Its totient is φ = 9121008.

The previous prime is 9121003. The next prime is 9121019. The reversal of 9121009 is 9001219.

9121009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6110784 + 3010225 = 2472^2 + 1735^2 .

It is an emirp because it is prime and its reverse (9001219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9121009 - 2⁹ = 9120497 is a prime.

It is not a weakly prime, because it can be changed into another prime (9121003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560504 + 4560505.

It is an arithmetic number, because the mean of its divisors is an integer number (4560505).

Almost surely, 2^9121009 is an apocalyptic number.

It is an amenable number.

9121009 is a deficient number, since it is larger than the sum of its proper divisors (1).

9121009 is an equidigital number, since it uses as much as digits as its factorization.

9121009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 9121009 is about 3020.1008261315. The cubic root of 9121009 is about 208.9364900929.

The spelling of 9121009 in words is "nine million, one hundred twenty-one thousand, nine".