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11729 = 37317

11729 has 4 divisors (see below), whose sum is σ = 12084. Its totient is φ = 11376.

The previous prime is 11719. The next prime is 11731. The reversal of 11729 is 92711.

11729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92711 = 831117.

It can be written as a sum of positive squares in 2 ways, for example, as 5329 + 6400 = 73^2 + 80^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-11729 is a prime.

It is a Duffinian number.

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 11729.

It is not an unprimeable number, because it can be changed into a prime (11719) 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, 122 + ... + 195.

It is an arithmetic number, because the mean of its divisors is an integer number (3021).

211729 is an apocalyptic number.

It is an amenable number.

11729 is a deficient number, since it is larger than the sum of its proper divisors (355).

11729 is an equidigital number, since it uses as much as digits as its factorization.

11729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354.

The product of its digits is 126, while the sum is 20.

The square root of 11729 is about 108.3005078474. The cubic root of 11729 is about 22.7206278756.

The spelling of 11729 in words is "eleven thousand, seven hundred twenty-nine".

Divisors: 1 37 317 11729