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BaseRepresentation
bin10111010111111
3121102020
42322333
5340332
6131223
746614
oct27277
917366
1011967
118a9a
126b13
1355a7
14450b
15382c
hex2ebf

11967 has 4 divisors (see below), whose sum is σ = 15960. Its totient is φ = 7976.

The previous prime is 11959. The next prime is 11969. The reversal of 11967 is 76911.

11967 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.

It is a cyclic number.

It is not a de Polignac number, because 11967 - 23 = 11959 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1992 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (3990).

211967 is an apocalyptic number.

11967 is a deficient number, since it is larger than the sum of its proper divisors (3993).

11967 is an equidigital number, since it uses as much as digits as its factorization.

11967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992.

The product of its digits is 378, while the sum is 24.

The square root of 11967 is about 109.3937841013. The cubic root of 11967 is about 22.8732791563.

The spelling of 11967 in words is "eleven thousand, nine hundred sixty-seven".

Divisors: 1 3 3989 11967