11191553 has 2 divisors, whose sum is σ = 11191554. Its totient is φ = 11191552.

The previous prime is 11191529. The next prime is 11191571. The reversal of 11191553 is 35519111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10061584 + 1129969 = 3172^2 + 1063^2 .

It is a cyclic number.

It is not a de Polignac number, because 11191553 - 2⁶ = 11191489 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11191573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5595776 + 5595777.

It is an arithmetic number, because the mean of its divisors is an integer number (5595777).

Almost surely, 2^11191553 is an apocalyptic number.

It is an amenable number.

11191553 is a deficient number, since it is larger than the sum of its proper divisors (1).

11191553 is an equidigital number, since it uses as much as digits as its factorization.

11191553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 675, while the sum is 26.

The square root of 11191553 is about 3345.3778560874. The cubic root of 11191553 is about 223.6815268562.

The spelling of 11191553 in words is "eleven million, one hundred ninety-one thousand, five hundred fifty-three".