9131009 has 2 divisors, whose sum is σ = 9131010. Its totient is φ = 9131008.

The previous prime is 9130991. The next prime is 9131011. The reversal of 9131009 is 9001319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9120400 + 10609 = 3020^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 9131009 - 2¹² = 9126913 is a prime.

It is a Sophie Germain prime.

Together with 9131011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9131209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4565504 + 4565505.

It is an arithmetic number, because the mean of its divisors is an integer number (4565505).

Almost surely, 2^9131009 is an apocalyptic number.

It is an amenable number.

9131009 is a deficient number, since it is larger than the sum of its proper divisors (1).

9131009 is an equidigital number, since it uses as much as digits as its factorization.

9131009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 9131009 is about 3021.7559464656. The cubic root of 9131009 is about 209.0128194330.

The spelling of 9131009 in words is "nine million, one hundred thirty-one thousand, nine".