149 (number)

149

one hundred forty-nine

149th
(one hundred forty-ninth)

35th

1, 49

CXLIX

10010101₂

12112₃

2111₄

1044₅

405₆

225₈

105₁₂

95₁₆

79₂₀

45₃₆

149 (one hundred [and] forty-nine) is the natural number between 148 and 150. It is also a prime number.

149 is the 35th prime number, and with the next prime number, 151, is a twin prime, thus 149 is a Chen prime.

149 is an emirp, since the number 941 is also prime.

149 is a strong prime in the sense that it is more than the arithmetic mean of its two neighboring primes.

149 is an irregular prime since it divides the numerator of the Bernoulli number B₁₃₀.

149 is an Eisenstein prime with no imaginary part and a real part of the form $3n-1$ .

The repunit with 149 1s is a prime in base 5 and base 7.

Given 149, the Mertens function returns 0. It is the third prime having this property.

149 is a tribonacci number, being the sum of the three preceding terms, 24, 44, 81.