11919 has 8 divisors (see below), whose sum is σ = 16560. Its totient is φ = 7616.

The previous prime is 11909. The next prime is 11923. The reversal of 11919 is 91911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11919 - 2⁴ = 11903 is a prime.

It is a super-2 number, since 2×11919² = 284125122, which contains 22 as substring.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 11895 and 11904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19 + ... + 155.

It is an arithmetic number, because the mean of its divisors is an integer number (2070).

2¹¹⁹¹⁹ is an apocalyptic number.

11919 is a deficient number, since it is larger than the sum of its proper divisors (4641).

11919 is a wasteful number, since it uses less digits than its factorization.

11919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169.

The product of its digits is 81, while the sum is 21.

The square root of 11919 is about 109.1741727699. The cubic root of 11919 is about 22.8426563712.

The spelling of 11919 in words is "eleven thousand, nine hundred nineteen".