11749 has 4 divisors (see below), whose sum is σ = 12160. Its totient is φ = 11340.

The previous prime is 11743. The next prime is 11777. The reversal of 11749 is 94711.

11749 = T₈₇ + T₈₈ + T₈₉.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94711 = 53 ⋅1787.

It is a cyclic number.

It is not a de Polignac number, because 11749 - 2⁵ = 11717 is a prime.

It is a Duffinian number.

It is a plaindrome in base 5.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159 + ... + 220.

It is an arithmetic number, because the mean of its divisors is an integer number (3040).

2¹¹⁷⁴⁹ is an apocalyptic number.

11749 is the 89-th centered triangular number.

It is an amenable number.

11749 is a deficient number, since it is larger than the sum of its proper divisors (411).

11749 is an equidigital number, since it uses as much as digits as its factorization.

11749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410.

The product of its digits is 252, while the sum is 22.

The square root of 11749 is about 108.3928041892. The cubic root of 11749 is about 22.7335347593.

The spelling of 11749 in words is "eleven thousand, seven hundred forty-nine".