11555197 has 2 divisors, whose sum is σ = 11555198. Its totient is φ = 11555196.

The previous prime is 11555183. The next prime is 11555207. The reversal of 11555197 is 79155511.

It is a happy number.

11555197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9278116 + 2277081 = 3046^2 + 1509^2 .

It is an emirp because it is prime and its reverse (79155511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11555197 - 2⁷ = 11555069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11555497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777598 + 5777599.

It is an arithmetic number, because the mean of its divisors is an integer number (5777599).

Almost surely, 2^11555197 is an apocalyptic number.

It is an amenable number.

11555197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11555197 is an equidigital number, since it uses as much as digits as its factorization.

11555197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7875, while the sum is 34.

The square root of 11555197 is about 3399.2936030887. The cubic root of 11555197 is about 226.0784245017.

The spelling of 11555197 in words is "eleven million, five hundred fifty-five thousand, one hundred ninety-seven".