Base | Representation |
---|---|
bin | 1001100111101… |
… | …11100010011001 |
3 | 12121212021101121 |
4 | 10303313202121 |
5 | 131130040224 |
6 | 12001445241 |
7 | 1666662361 |
oct | 463674231 |
9 | 177767347 |
10 | 80705689 |
11 | 41613419 |
12 | 23040821 |
13 | 1394965c |
14 | aa0b9a1 |
15 | 7142be4 |
hex | 4cf7899 |
80705689 has 8 divisors (see below), whose sum is σ = 85282560. Its totient is φ = 76217856.
The previous prime is 80705683. The next prime is 80705717. The reversal of 80705689 is 98650708.
It is a happy number.
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 80705689 - 27 = 80705561 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (80705683) 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, 20392 + ... + 24025.
It is an arithmetic number, because the mean of its divisors is an integer number (10660320).
Almost surely, 280705689 is an apocalyptic number.
It is an amenable number.
80705689 is a deficient number, since it is larger than the sum of its proper divisors (4576871).
80705689 is a wasteful number, since it uses less digits than its factorization.
80705689 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 44519.
The product of its (nonzero) digits is 120960, while the sum is 43.
The square root of 80705689 is about 8983.6345094845. The cubic root of 80705689 is about 432.1501981873.
The spelling of 80705689 in words is "eighty million, seven hundred five thousand, six hundred eighty-nine".
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