13857903 has 18 divisors (see below), whose sum is σ = 20556432. Its totient is φ = 8992080.

The previous prime is 13857901. The next prime is 13857947. The reversal of 13857903 is 30975831.

It is not a de Polignac number, because 13857903 - 2¹ = 13857901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13857901) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 76473 + ... + 76653.

It is an arithmetic number, because the mean of its divisors is an integer number (1142024).

Almost surely, 2^13857903 is an apocalyptic number.

13857903 is a deficient number, since it is larger than the sum of its proper divisors (6698529).

13857903 is an equidigital number, since it uses as much as digits as its factorization.

13857903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 13857903 is about 3722.6204480178. The cubic root of 13857903 is about 240.1960377447.

The spelling of 13857903 in words is "thirteen million, eight hundred fifty-seven thousand, nine hundred three".