117857 has 4 divisors (see below), whose sum is σ = 124080. Its totient is φ = 111636.

The previous prime is 117851. The next prime is 117877. The reversal of 117857 is 758711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 117857 - 2⁴ = 117841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3083 + ... + 3120.

It is an arithmetic number, because the mean of its divisors is an integer number (31020).

2¹¹⁷⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

117857 is a deficient number, since it is larger than the sum of its proper divisors (6223).

117857 is an equidigital number, since it uses as much as digits as its factorization.

117857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222.

The product of its digits is 1960, while the sum is 29.

The square root of 117857 is about 343.3030731001. The cubic root of 117857 is about 49.0288598557.

The spelling of 117857 in words is "one hundred seventeen thousand, eight hundred fifty-seven".