11189090897 has 2 divisors, whose sum is σ = 11189090898. Its totient is φ = 11189090896.

The previous prime is 11189090893. The next prime is 11189090921. The reversal of 11189090897 is 79809098111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11185389121 + 3701776 = 105761^2 + 1924^2 .

It is an emirp because it is prime and its reverse (79809098111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11189090897 - 2² = 11189090893 is a prime.

It is not a weakly prime, because it can be changed into another prime (11189090893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5594545448 + 5594545449.

It is an arithmetic number, because the mean of its divisors is an integer number (5594545449).

Almost surely, 2^11189090897 is an apocalyptic number.

It is an amenable number.

11189090897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11189090897 is an equidigital number, since it uses as much as digits as its factorization.

11189090897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 53.

The spelling of 11189090897 in words is "eleven billion, one hundred eighty-nine million, ninety thousand, eight hundred ninety-seven".