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11309 = 43263
BaseRepresentation
bin10110000101101
3120111212
42300231
5330214
6124205
744654
oct26055
916455
1011309
118551
126665
1351bc
14419b
15353e
hex2c2d

11309 has 4 divisors (see below), whose sum is σ = 11616. Its totient is φ = 11004.

The previous prime is 11299. The next prime is 11311. The reversal of 11309 is 90311.

11309 is digitally balanced in base 2, 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90311 = 136947.

It is a cyclic number.

It is not a de Polignac number, because 11309 - 212 = 7213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 11 and base 12.

It is a junction number, because it is equal to n+sod(n) for n = 11293 and 11302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89 + ... + 174.

It is an arithmetic number, because the mean of its divisors is an integer number (2904).

211309 is an apocalyptic number.

It is an amenable number.

11309 is a deficient number, since it is larger than the sum of its proper divisors (307).

11309 is an equidigital number, since it uses as much as digits as its factorization.

11309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 11309 is about 106.3437821408. The cubic root of 11309 is about 22.4461262523.

The spelling of 11309 in words is "eleven thousand, three hundred nine".

Divisors: 1 43 263 11309