13378779 has 12 divisors (see below), whose sum is σ = 20461896. Its totient is φ = 8394432.

The previous prime is 13378777. The next prime is 13378787. The reversal of 13378779 is 97787331.

13378779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13378779 - 2¹ = 13378777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13378777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43569 + ... + 43874.

It is an arithmetic number, because the mean of its divisors is an integer number (1705158).

Almost surely, 2^13378779 is an apocalyptic number.

13378779 is a deficient number, since it is larger than the sum of its proper divisors (7083117).

13378779 is a wasteful number, since it uses less digits than its factorization.

13378779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87466 (or 87463 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 13378779 is about 3657.7013273366. The cubic root of 13378779 is about 237.3953237700.

The spelling of 13378779 in words is "thirteen million, three hundred seventy-eight thousand, seven hundred seventy-nine".