13938775 has 6 divisors (see below), whose sum is σ = 17284112. Its totient is φ = 11151000.

The previous prime is 13938739. The next prime is 13938779. The reversal of 13938775 is 57783931.

13938775 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 13938775 - 2¹⁹ = 13414487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13938779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278751 + ... + 278800.

Almost surely, 2^13938775 is an apocalyptic number.

13938775 is a deficient number, since it is larger than the sum of its proper divisors (3345337).

13938775 is an equidigital number, since it uses as much as digits as its factorization.

13938775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557561 (or 557556 counting only the distinct ones).

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

The square root of 13938775 is about 3733.4668874921. The cubic root of 13938775 is about 240.6623773949.

The spelling of 13938775 in words is "thirteen million, nine hundred thirty-eight thousand, seven hundred seventy-five".