13871705 has 8 divisors (see below), whose sum is σ = 16919304. Its totient is φ = 10915200.

The previous prime is 13871699. The next prime is 13871713. The reversal of 13871705 is 50717831.

It can be written as a sum of positive squares in 4 ways, for example, as 1290496 + 12581209 = 1136^2 + 3547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13871705 - 2¹⁴ = 13855321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22436 + ... + 23045.

It is an arithmetic number, because the mean of its divisors is an integer number (2114913).

Almost surely, 2^13871705 is an apocalyptic number.

It is an amenable number.

13871705 is a deficient number, since it is larger than the sum of its proper divisors (3047599).

13871705 is an equidigital number, since it uses as much as digits as its factorization.

13871705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45547.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 13871705 is about 3724.4737883357. The cubic root of 13871705 is about 240.2757536469.

The spelling of 13871705 in words is "thirteen million, eight hundred seventy-one thousand, seven hundred five".