118691 has 2 divisors, whose sum is σ = 118692. Its totient is φ = 118690.

The previous prime is 118687. The next prime is 118709. The reversal of 118691 is 196811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 118691 - 2² = 118687 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118691.

It is not a weakly prime, because it can be changed into another prime (118621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59345 + 59346.

It is an arithmetic number, because the mean of its divisors is an integer number (59346).

2¹¹⁸⁶⁹¹ is an apocalyptic number.

118691 is a deficient number, since it is larger than the sum of its proper divisors (1).

118691 is an equidigital number, since it uses as much as digits as its factorization.

118691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 26.

The square root of 118691 is about 344.5156019689. The cubic root of 118691 is about 49.1442369523.

The spelling of 118691 in words is "one hundred eighteen thousand, six hundred ninety-one".