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natural numbers 1, 2, 3, 4, and so forth. Numbers can be represented in language with number words. More universally, individual numbers can be represented...

A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that...

Number theory (or arithmetic or higher arithmetic in older usage) is a branch of pure mathematics devoted primarily to the study of the integers and arithmetic...

In mathematics, a complex number is an element of a number system that extends the real numbers with a specific element denoted i, called the imaginary...

69 (sixty-nine; LXIX) is the natural number following 68 and preceding 70. An odd number and a composite number, 69 is divisible by 1, 3, 23 and 69. 69...

The symbol # is known variously in English-speaking regions as the number sign, hash, or pound sign. The symbol has historically been used for a wide...

hundred [and] sixty-six) is the natural number following 665 and preceding 667. In Christianity, 666 is referred to in (most manuscripts of) chapter 13 of...

numbers in the other number systems. Properties of the natural numbers, such as divisibility and the distribution of prime numbers, are studied in number theory...

In mathematics, a rational number is a number that can be expressed as the quotient or fraction p q {\displaystyle {\tfrac {p}{q}}} of two integers, a...

thousand or 1000 in Wiktionary, the free dictionary. 1000 or one thousand is the natural number following 999 and preceding 1001. In most English-speaking...

369 (three hundred [and] sixty-nine) is the natural number following 368 and preceding 370. 369 is the magic constant of the 9 × 9 magic square and the...

In mathematics, a real number is a number that can be used to measure a continuous one-dimensional quantity such as a distance, duration or temperature...

In fluid dynamics, the Reynolds number (Re) is a dimensionless quantity that helps predict fluid flow patterns in different situations by measuring the...

the third composite number to be the product of a squared prime and a prime (and also the second member of the 22 × q family in this form). It has an...

A telephone number is a sequence of digits assigned to a landline telephone subscriber station connected to a telephone line or to a wireless electronic...

the natural number following 272 and preceding 274. 273 is a sphenic number, a truncated triangular pyramid number and an idoneal number. There are 273...

(fifty) is the natural number following 49 and preceding 51. Fifty is the smallest number that is the sum of two non-zero square numbers in two distinct ways:...

mass number (symbol A, from the German word: Atomgewicht, "atomic weight"), also called atomic mass number or nucleon number, is the total number of protons...

The following are lists of films which have been placed number one at the weekend box office in a region. Contents 1948–1959 1960–1969 1970–1979 1980–1989...

Prime in the 43-aliquot tree. a companion Pell number. a happy number. palindromic in bases 3 (100013), 9 (1019) and 40 (2240). The atomic number of lead...