11291897 has 2 divisors, whose sum is σ = 11291898. Its totient is φ = 11291896.

The previous prime is 11291887. The next prime is 11291899. The reversal of 11291897 is 79819211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11182336 + 109561 = 3344^2 + 331^2 .

It is an emirp because it is prime and its reverse (79819211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11291897 - 2⁴ = 11291881 is a prime.

Together with 11291899, it forms a pair of twin primes.

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 11291897.

It is not a weakly prime, because it can be changed into another prime (11291899) 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, 5645948 + 5645949.

It is an arithmetic number, because the mean of its divisors is an integer number (5645949).

Almost surely, 2^11291897 is an apocalyptic number.

It is an amenable number.

11291897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11291897 is an equidigital number, since it uses as much as digits as its factorization.

11291897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 38.

The square root of 11291897 is about 3360.3417980914. The cubic root of 11291897 is about 224.3480518687.

The spelling of 11291897 in words is "eleven million, two hundred ninety-one thousand, eight hundred ninety-seven".