13978375 has 8 divisors (see below), whose sum is σ = 17445168. Its totient is φ = 11182600.

The previous prime is 13978337. The next prime is 13978421. The reversal of 13978375 is 57387931.

13978375 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 13978375 - 2¹³ = 13970183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55789 + ... + 56038.

It is an arithmetic number, because the mean of its divisors is an integer number (2180646).

Almost surely, 2^13978375 is an apocalyptic number.

13978375 is a deficient number, since it is larger than the sum of its proper divisors (3466793).

13978375 is an equidigital number, since it uses as much as digits as its factorization.

13978375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111842 (or 111832 counting only the distinct ones).

The product of its digits is 158760, while the sum is 43.

The square root of 13978375 is about 3738.7665078205. The cubic root of 13978375 is about 240.8900688348.

The spelling of 13978375 in words is "thirteen million, nine hundred seventy-eight thousand, three hundred seventy-five".