Search a number
11779 is a prime number

11779 has 2 divisors, whose sum is σ = 11780. Its totient is φ = 11778.

The previous prime is 11777. The next prime is 11783. The reversal of 11779 is 97711.

It is a weak prime.

It is an emirp because it is prime and its reverse (97711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11779 - 21 = 11777 is a prime.

Together with 11777, it forms a pair of twin primes.

It is an Ulam number.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (11777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5889 + 5890.

It is an arithmetic number, because the mean of its divisors is an integer number (5890).

211779 is an apocalyptic number.

11779 is a deficient number, since it is larger than the sum of its proper divisors (1).

11779 is an equidigital number, since it uses as much as digits as its factorization.

11779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 441, while the sum is 25.

The square root of 11779 is about 108.5311015332. The cubic root of 11779 is about 22.7528676496.

It can be divided in two parts, 117 and 79, that added together give a square (196 = 142).

The spelling of 11779 in words is "eleven thousand, seven hundred seventy-nine".