11233543897 has 2 divisors, whose sum is σ = 11233543898. Its totient is φ = 11233543896.

The previous prime is 11233543879. The next prime is 11233543903. The reversal of 11233543897 is 79834533211.

11233543897 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 (11233543879) 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., 8743933081 + 2489610816 = 93509^2 + 49896^2 .

It is an emirp because it is prime and its reverse (79834533211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11233543897 is a prime.

It is not a weakly prime, because it can be changed into another prime (11233543807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5616771948 + 5616771949.

It is an arithmetic number, because the mean of its divisors is an integer number (5616771949).

Almost surely, 2^11233543897 is an apocalyptic number.

It is an amenable number.

11233543897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11233543897 is an equidigital number, since it uses as much as digits as its factorization.

11233543897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

It can be divided in two parts, 1123354 and 3897, that added together give a triangular number (1127251 = T₁₅₀₁).

The spelling of 11233543897 in words is "eleven billion, two hundred thirty-three million, five hundred forty-three thousand, eight hundred ninety-seven".