13378563 has 24 divisors (see below), whose sum is σ = 21196656. Its totient is φ = 8064000.

The previous prime is 13378553. The next prime is 13378579. The reversal of 13378563 is 36587331.

13378563 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13378563 - 2⁶ = 13378499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13378513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33163 + ... + 33563.

It is an arithmetic number, because the mean of its divisors is an integer number (883194).

Almost surely, 2^13378563 is an apocalyptic number.

13378563 is a deficient number, since it is larger than the sum of its proper divisors (7818093).

13378563 is a wasteful number, since it uses less digits than its factorization.

13378563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 752 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 13378563 is about 3657.6718004764. The cubic root of 13378563 is about 237.3940461829.

The spelling of 13378563 in words is "thirteen million, three hundred seventy-eight thousand, five hundred sixty-three".