13897857 has 8 divisors (see below), whose sum is σ = 19620576. Its totient is φ = 8720192.

The previous prime is 13897843. The next prime is 13897867. The reversal of 13897857 is 75879831.

13897857 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13897857 - 2⁴ = 13897841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13897867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136203 + ... + 136304.

It is an arithmetic number, because the mean of its divisors is an integer number (2452572).

Almost surely, 2^13897857 is an apocalyptic number.

13897857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13897857 is a deficient number, since it is larger than the sum of its proper divisors (5722719).

13897857 is a wasteful number, since it uses less digits than its factorization.

13897857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272527.

The product of its digits is 423360, while the sum is 48.

The square root of 13897857 is about 3727.9829666993. The cubic root of 13897857 is about 240.4266542705.

The spelling of 13897857 in words is "thirteen million, eight hundred ninety-seven thousand, eight hundred fifty-seven".