118 (number)

In mathematics

There is no answer to the equation φ(x) = 118, making 118 a nontotient.

118 is the smallest n such that the range n, n + 1, ... 4n/3 contains at least one prime from each of these forms: 4x + 1, 4x - 1, 6x + 1 and 6x - 1.

Four expressions for 118 as the sum of three positive integers have the same product:

14 + 50 + 54 = 15 + 40 + 63 = 18 + 30 + 70 = 21 + 25 + 72 = 118 and 14 × 50 × 54 = 15 × 40 × 63 = 18 × 30 × 70 = 21 × 25 × 72 = 37800.

118 is the smallest number that can be expressed as four sums with the same product in this way.

In telephony

The beginning of directory enquiries numbers in the United Kingdom, France, Germany, Greece, Latvia, Sweden, Ireland, Iran and Turkey

The emergency at sea emergency telephone number in Japan

The fire emergency telephone number in Switzerland

The medical emergency telephone number in Bolivia and Indonesia

The medical and Alpine rescue emergency telephone number in Italy

In other fields

One hundred and eighteen is also:

The number of elements on the periodic table

Oganesson, an element with atomic number 118

118 (TV series), a 255-episode Singaporean television drama airing from 2014 to 2015

118 (Robotics Team), have you seen 118?

In dates

118 can also represent the day January 18. The 118th day of the year is April 28, on regular years. On leap years it is April 27.