11791009 has 2 divisors, whose sum is σ = 11791010. Its totient is φ = 11791008.

The previous prime is 11791007. The next prime is 11791037. The reversal of 11791009 is 90019711.

It is an a-pointer prime, because the next prime (11791037) can be obtained adding 11791009 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9941409 + 1849600 = 3153^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 11791009 - 2¹ = 11791007 is a prime.

Together with 11791007, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11791007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5895504 + 5895505.

It is an arithmetic number, because the mean of its divisors is an integer number (5895505).

Almost surely, 2^11791009 is an apocalyptic number.

It is an amenable number.

11791009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11791009 is an equidigital number, since it uses as much as digits as its factorization.

11791009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 11791009 is about 3433.8038674333. The cubic root of 11791009 is about 227.6059740546.

The spelling of 11791009 in words is "eleven million, seven hundred ninety-one thousand, nine".