11549 has 2 divisors, whose sum is σ = 11550. Its totient is φ = 11548.
The previous prime is 11527. The next prime is 11551. The reversal of 11549 is 94511.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 11449 + 100 = 107^2 + 10^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-11549 is a prime.
It is a super-4 number, since 4×115494 = 71160258444475204, which contains 4444 as substring.
It is a Sophie Germain prime.
Together with 11551, it forms a pair of twin primes.
It is a Chen prime.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 11549.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 11549.
It is not a weakly prime, because it can be changed into another prime (11519) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5774 + 5775.
It is an arithmetic number, because the mean of its divisors is an integer number (5775).
211549 is an apocalyptic number.
It is an amenable number.
11549 is a deficient number, since it is larger than the sum of its proper divisors (1).
11549 is an equidigital number, since it uses as much as digits as its factorization.
11549 is an evil number, because the sum of its binary digits is even.
The product of its digits is 180, while the sum is 20.
The square root of 11549 is about 107.4662737793. The cubic root of 11549 is about 22.6038002329.
The spelling of 11549 in words is "eleven thousand, five hundred forty-nine".
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