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149311 = 178783
BaseRepresentation
bin100100011100111111
321120211001
4210130333
514234221
63111131
71161211
oct443477
9246731
10149311
11a21a8
12724a7
1352c66
143c5b1
152e391
hex2473f

149311 has 4 divisors (see below), whose sum is σ = 158112. Its totient is φ = 140512.

The previous prime is 149309. The next prime is 149323. The reversal of 149311 is 113941.

149311 = T314 + T315 + T316.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113941 = 293929.

It is a cyclic number.

It is not a de Polignac number, because 149311 - 21 = 149309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149341) 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 in 3 ways as a sum of consecutive naturals, for example, 4375 + ... + 4408.

It is an arithmetic number, because the mean of its divisors is an integer number (39528).

2149311 is an apocalyptic number.

149311 is the 316-th centered triangular number.

149311 is a deficient number, since it is larger than the sum of its proper divisors (8801).

149311 is an equidigital number, since it uses as much as digits as its factorization.

149311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8800.

The product of its digits is 108, while the sum is 19.

The square root of 149311 is about 386.4078156559. The cubic root of 149311 is about 53.0514511636.

The spelling of 149311 in words is "one hundred forty-nine thousand, three hundred eleven".

Divisors: 1 17 8783 149311