11217749 has 2 divisors, whose sum is σ = 11217750. Its totient is φ = 11217748.

The previous prime is 11217737. The next prime is 11217757. The reversal of 11217749 is 94771211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7739524 + 3478225 = 2782^2 + 1865^2 .

It is an emirp because it is prime and its reverse (94771211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11217749 - 2¹⁶ = 11152213 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11217769) 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, 5608874 + 5608875.

It is an arithmetic number, because the mean of its divisors is an integer number (5608875).

Almost surely, 2^11217749 is an apocalyptic number.

It is an amenable number.

11217749 is a deficient number, since it is larger than the sum of its proper divisors (1).

11217749 is an equidigital number, since it uses as much as digits as its factorization.

11217749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 32.

The square root of 11217749 is about 3349.2908204574. The cubic root of 11217749 is about 223.8559141940.

The spelling of 11217749 in words is "eleven million, two hundred seventeen thousand, seven hundred forty-nine".