11391329 has 2 divisors, whose sum is σ = 11391330. Its totient is φ = 11391328.

The previous prime is 11391293. The next prime is 11391337. The reversal of 11391329 is 92319311.

11391329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (11391293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10240000 + 1151329 = 3200^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 11391329 - 2⁸ = 11391073 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₇₅₀₅₈₄ and since 11391329 and 750584 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11391349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5695664 + 5695665.

It is an arithmetic number, because the mean of its divisors is an integer number (5695665).

Almost surely, 2^11391329 is an apocalyptic number.

It is an amenable number.

11391329 is a deficient number, since it is larger than the sum of its proper divisors (1).

11391329 is an equidigital number, since it uses as much as digits as its factorization.

11391329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 29.

The square root of 11391329 is about 3375.1042946848. The cubic root of 11391329 is about 225.0046352955.

The spelling of 11391329 in words is "eleven million, three hundred ninety-one thousand, three hundred twenty-nine".