11286991 has 2 divisors, whose sum is σ = 11286992. Its totient is φ = 11286990.

The previous prime is 11286959. The next prime is 11287051. The reversal of 11286991 is 19968211.

11286991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11286991 - 2⁵ = 11286959 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11286991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11286901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5643495 + 5643496.

It is an arithmetic number, because the mean of its divisors is an integer number (5643496).

Almost surely, 2^11286991 is an apocalyptic number.

11286991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11286991 is an equidigital number, since it uses as much as digits as its factorization.

11286991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 37.

The square root of 11286991 is about 3359.6117335192. The cubic root of 11286991 is about 224.3155562664.

The spelling of 11286991 in words is "eleven million, two hundred eighty-six thousand, nine hundred ninety-one".