13871657 has 8 divisors (see below), whose sum is σ = 14392200. Its totient is φ = 13353984.

The previous prime is 13871623. The next prime is 13871687. The reversal of 13871657 is 75617831.

13871657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7054336 + 6817321 = 2656^2 + 2611^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13871657 - 2⁶ = 13871593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13871657.

It is not an unprimeable number, because it can be changed into a prime (13871617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16319 + ... + 17147.

It is an arithmetic number, because the mean of its divisors is an integer number (1799025).

Almost surely, 2^13871657 is an apocalyptic number.

It is an amenable number.

13871657 is a deficient number, since it is larger than the sum of its proper divisors (520543).

13871657 is an equidigital number, since it uses as much as digits as its factorization.

13871657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435.

The product of its digits is 35280, while the sum is 38.

The square root of 13871657 is about 3724.4673444669. The cubic root of 13871657 is about 240.2754765060.

The spelling of 13871657 in words is "thirteen million, eight hundred seventy-one thousand, six hundred fifty-seven".