Base | Representation |
---|---|
bin | 10000010010101… |
… | …11100000000001 |
3 | 100112011201111101 |
4 | 20021113200001 |
5 | 234442021111 |
6 | 21321214401 |
7 | 3246463243 |
oct | 1011274001 |
9 | 315151441 |
10 | 136673281 |
11 | 7016a728 |
12 | 39931401 |
13 | 22414084 |
14 | 1421a093 |
15 | beeabc1 |
hex | 8257801 |
136673281 has 8 divisors (see below), whose sum is σ = 138162024. Its totient is φ = 135192960.
The previous prime is 136673267. The next prime is 136673293. The reversal of 136673281 is 182376631.
136673281 = 4252 + 4262 + ... + 7862.
It can be written as a sum of positive squares in 4 ways, for example, as 6713281 + 129960000 = 2591^2 + 11400^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 136673281 - 25 = 136673249 is a prime.
It is a super-2 number, since 2×1366732812 = 37359171478609922, which contains 22 as substring.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 136673281.
It is not an unprimeable number, because it can be changed into a prime (136674281) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33741 + ... + 37573.
It is an arithmetic number, because the mean of its divisors is an integer number (17270253).
Almost surely, 2136673281 is an apocalyptic number.
It is an amenable number.
136673281 is a deficient number, since it is larger than the sum of its proper divisors (1488743).
136673281 is a wasteful number, since it uses less digits than its factorization.
136673281 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4211.
The product of its digits is 36288, while the sum is 37.
The square root of 136673281 is about 11690.7348357578. The cubic root of 136673281 is about 515.1035465907.
It can be divided in two parts, 1366 and 73281, that added together give a palindrome (74647).
The spelling of 136673281 in words is "one hundred thirty-six million, six hundred seventy-three thousand, two hundred eighty-one".
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