11290991 has 2 divisors, whose sum is σ = 11290992. Its totient is φ = 11290990.

The previous prime is 11290973. The next prime is 11291011. The reversal of 11290991 is 19909211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11290991 - 2⁶ = 11290927 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11290901) 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, 5645495 + 5645496.

It is an arithmetic number, because the mean of its divisors is an integer number (5645496).

Almost surely, 2^11290991 is an apocalyptic number.

11290991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11290991 is an equidigital number, since it uses as much as digits as its factorization.

11290991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 11290991 is about 3360.2069876720. The cubic root of 11290991 is about 224.3420515550.

The spelling of 11290991 in words is "eleven million, two hundred ninety thousand, nine hundred ninety-one".