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11993 = 67179
BaseRepresentation
bin10111011011001
3121110012
42323121
5340433
6131305
746652
oct27331
917405
1011993
119013
126b35
1355c7
144529
153848
hex2ed9

11993 has 4 divisors (see below), whose sum is σ = 12240. Its totient is φ = 11748.

The previous prime is 11987. The next prime is 12007. The reversal of 11993 is 39911.

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: 39911 = 107373.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-11993 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 11993.

It is not an unprimeable number, because it can be changed into a prime (11903) 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, 23 + ... + 156.

It is an arithmetic number, because the mean of its divisors is an integer number (3060).

211993 is an apocalyptic number.

It is an amenable number.

11993 is a deficient number, since it is larger than the sum of its proper divisors (247).

11993 is an equidigital number, since it uses as much as digits as its factorization.

11993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246.

The product of its digits is 243, while the sum is 23.

The square root of 11993 is about 109.5125563577. The cubic root of 11993 is about 22.8898323187.

It can be divided in two parts, 119 and 93, that added together give a palindrome (212).

The spelling of 11993 in words is "eleven thousand, nine hundred ninety-three".

Divisors: 1 67 179 11993