163857 has 8 divisors (see below), whose sum is σ = 220384. Its totient is φ = 108288.

The previous prime is 163853. The next prime is 163859. The reversal of 163857 is 758361.

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

It is not a de Polignac number, because 163857 - 2² = 163853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163853) 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, 438 + ... + 720.

It is an arithmetic number, because the mean of its divisors is an integer number (27548).

2¹⁶³⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

163857 is a deficient number, since it is larger than the sum of its proper divisors (56527).

163857 is a wasteful number, since it uses less digits than its factorization.

163857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479.

The product of its digits is 5040, while the sum is 30.

The square root of 163857 is about 404.7925394569. The cubic root of 163857 is about 54.7211227797.

The spelling of 163857 in words is "one hundred sixty-three thousand, eight hundred fifty-seven".