118831 has 2 divisors, whose sum is σ = 118832. Its totient is φ = 118830.

The previous prime is 118819. The next prime is 118843. The reversal of 118831 is 138811.

It is a balanced prime because it is at equal distance from previous prime (118819) and next prime (118843).

It is a cyclic number.

It is not a de Polignac number, because 118831 - 2⁵ = 118799 is a prime.

It is a super-2 number, since 2×118831² = 28241613122, which contains 22 as substring.

It is an Ulam number.

118831 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59415 + 59416.

It is an arithmetic number, because the mean of its divisors is an integer number (59416).

2¹¹⁸⁸³¹ is an apocalyptic number.

118831 is a deficient number, since it is larger than the sum of its proper divisors (1).

118831 is an equidigital number, since it uses as much as digits as its factorization.

118831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 22.

The square root of 118831 is about 344.7187259201. The cubic root of 118831 is about 49.1635517833.

It can be divided in two parts, 118 and 831, that added together give a palindrome (949).

The spelling of 118831 in words is "one hundred eighteen thousand, eight hundred thirty-one".