13919 has 4 divisors (see below), whose sum is σ = 14400. Its totient is φ = 13440.

The previous prime is 13913. The next prime is 13921. The reversal of 13919 is 91931.

13919 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 13919 - 2⁴ = 13903 is a prime.

It is a super-2 number, since 2×13919² = 387477122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13894 and 13903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13913) 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, 194 + ... + 255.

It is an arithmetic number, because the mean of its divisors is an integer number (3600).

2¹³⁹¹⁹ is an apocalyptic number.

13919 is a deficient number, since it is larger than the sum of its proper divisors (481).

13919 is an equidigital number, since it uses as much as digits as its factorization.

13919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480.

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

The square root of 13919 is about 117.9788116570. The cubic root of 13919 is about 24.0548513949.

The spelling of 13919 in words is "thirteen thousand, nine hundred nineteen".