Base | Representation |
---|---|
bin | 1000101010100… |
… | …10010000000011 |
3 | 12001202222001222 |
4 | 10111102100003 |
5 | 122102014033 |
6 | 11113545255 |
7 | 1541562146 |
oct | 425222003 |
9 | 161688058 |
10 | 72688643 |
11 | 38038065 |
12 | 2041522b |
13 | 120a0541 |
14 | 992205d |
15 | 65ac598 |
hex | 4552403 |
72688643 has 2 divisors, whose sum is σ = 72688644. Its totient is φ = 72688642.
The previous prime is 72688621. The next prime is 72688669. The reversal of 72688643 is 34688627.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 72688643 - 216 = 72623107 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 72688594 and 72688603.
It is not a weakly prime, because it can be changed into another prime (72688543) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36344321 + 36344322.
It is an arithmetic number, because the mean of its divisors is an integer number (36344322).
Almost surely, 272688643 is an apocalyptic number.
72688643 is a deficient number, since it is larger than the sum of its proper divisors (1).
72688643 is an equidigital number, since it uses as much as digits as its factorization.
72688643 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 387072, while the sum is 44.
The square root of 72688643 is about 8525.7634848734. The cubic root of 72688643 is about 417.3388872413.
The spelling of 72688643 in words is "seventy-two million, six hundred eighty-eight thousand, six hundred forty-three".
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