117687 has 4 divisors (see below), whose sum is σ = 156920. Its totient is φ = 78456.

The previous prime is 117679. The next prime is 117701. The reversal of 117687 is 786711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786711 = 3 ⋅262237.

It is not a de Polignac number, because 117687 - 2³ = 117679 is a prime.

It is a D-number.

It is a Duffinian number.

117687 is a lucky number.

It is a plaindrome in base 8.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 117687.

It is not an unprimeable number, because it can be changed into a prime (117617) 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, 19612 + ... + 19617.

It is an arithmetic number, because the mean of its divisors is an integer number (39230).

2¹¹⁷⁶⁸⁷ is an apocalyptic number.

117687 is a deficient number, since it is larger than the sum of its proper divisors (39233).

117687 is an equidigital number, since it uses as much as digits as its factorization.

117687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39232.

The product of its digits is 2352, while the sum is 30.

The square root of 117687 is about 343.0553891138. The cubic root of 117687 is about 49.0052750117.

The spelling of 117687 in words is "one hundred seventeen thousand, six hundred eighty-seven".