190 (number)

190 is the natural number following one hundred eighty-nine and preceding one hundred ninety-one.

List of numbers — Integers
<< 100 110 120 130 140 150 160 170 180 190 >>

Ordinal One hundred [and]
ninety
Cardinal 190th
Factorization
Roman numeral CIC
Binary 10111110
Hexadecimal BE

One hundred ninety is a sphenic number and a Harshad number. It is a triangular number and a hexagonal number.

One hundred ninety is also

The designation of some spur routes of Interstate 90.
For the year, see 190 AD.

Other numbers in the 190s

191 = prime number, palindromic prime, permutable prime

192 = 2^6 3, sum of ten consecutive primes (5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37), Harshad number

193 = prime number, only known odd prime n for which 2 is not a primitive root of 4n² + 1.

194 = 2 97, nontotient

195 = 3 5 13, sphenic number, one of the few odd numbers to be surrounded on both sides by twin primes, Harshad number

196 = 2^2 7^2, pentagonal pyramidal number

197 = prime number, sum of seven consecutive primes (17 + 19 + 23 + 29 + 31 + 37 + 41), sum of eleven consecutive primes (3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37), Keith number, Mertens function(197) = -7 a record low

198 = 2 3^2 11, Harshad number

199 = prime number, sum of three consecutive primes (61 + 67 + 71), sum of five consecutive primes (31 + 37 + 41 + 43 + 47), Lucas number, Mertens function(199) = -8 a record low, centered triangular number