118731 has 8 divisors (see below), whose sum is σ = 166720. Its totient is φ = 74952.

The previous prime is 118717. The next prime is 118739. The reversal of 118731 is 137811.

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

It is not a de Polignac number, because 118731 - 2⁷ = 118603 is a prime.

It is a super-2 number, since 2×118731² = 28194100722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118698 and 118707.

It is not an unprimeable number, because it can be changed into a prime (118739) 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, 985 + ... + 1098.

It is an arithmetic number, because the mean of its divisors is an integer number (20840).

2¹¹⁸⁷³¹ is an apocalyptic number.

118731 is a deficient number, since it is larger than the sum of its proper divisors (47989).

118731 is a wasteful number, since it uses less digits than its factorization.

118731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105.

The product of its digits is 168, while the sum is 21.

The square root of 118731 is about 344.5736496019. The cubic root of 118731 is about 49.1497570246.

The spelling of 118731 in words is "one hundred eighteen thousand, seven hundred thirty-one".