11913 has 12 divisors (see below), whose sum is σ = 18288.
Its totient is φ = 6840.
The previous prime is 11909. The next prime is 11923. The reversal of 11913 is 31911.
11913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is not a de Polignac number, because 11913 - 22 = 11909 is a prime.
It is a hoax number, since the sum of its digits (15) coincides with the sum of the digits of its distinct prime factors.
It is a Curzon number.
It is a plaindrome in base 14.
It is a junction number, because it is equal to n+sod(n) for n = 11892 and 11901.
It is not an unprimeable number, because it can be changed into a prime (11903) 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 11 ways as a sum of consecutive naturals, for example, 618 + ... + 636.
It is an arithmetic number, because the mean of its divisors is an integer number (1524).
211913 is an apocalyptic number.
It is an amenable number.
11913 is a deficient number, since it is larger than the sum of its proper divisors (6375).
11913 is a wasteful number, since it uses less digits than its factorization.
11913 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 52 (or 33 counting only the distinct ones).
The product of its digits is 27, while the sum is 15.
The square root of 11913 is about 109.1466902842.
The cubic root of 11913 is about 22.8388227459.
The spelling of 11913 in words is "eleven thousand, nine hundred thirteen".