13779443 has 4 divisors (see below), whose sum is σ = 13913328. Its totient is φ = 13645560.

The previous prime is 13779439. The next prime is 13779449. The reversal of 13779443 is 34497731.

It is a happy number.

13779443 is digitally balanced in base 2, 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 13779443 - 2² = 13779439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13779397 and 13779406.

It is not an unprimeable number, because it can be changed into a prime (13779449) 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, 66788 + ... + 66993.

It is an arithmetic number, because the mean of its divisors is an integer number (3478332).

Almost surely, 2^13779443 is an apocalyptic number.

13779443 is a deficient number, since it is larger than the sum of its proper divisors (133885).

13779443 is a wasteful number, since it uses less digits than its factorization.

13779443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133884.

The product of its digits is 63504, while the sum is 38.

The square root of 13779443 is about 3712.0672138311. The cubic root of 13779443 is about 239.7418694595.

The spelling of 13779443 in words is "thirteen million, seven hundred seventy-nine thousand, four hundred forty-three".