Base | Representation |
---|---|
bin | 1001100111000… |
… | …10110100111101 |
3 | 12121200222000211 |
4 | 10303202310331 |
5 | 131114331421 |
6 | 11555552421 |
7 | 1666160146 |
oct | 463426475 |
9 | 177628024 |
10 | 80620861 |
11 | 41565712 |
12 | 22bbb711 |
13 | 13919b69 |
14 | a9c8acd |
15 | 71279e1 |
hex | 4ce2d3d |
80620861 has 2 divisors, whose sum is σ = 80620862. Its totient is φ = 80620860.
The previous prime is 80620849. The next prime is 80620873. The reversal of 80620861 is 16802608.
It is a balanced prime because it is at equal distance from previous prime (80620849) and next prime (80620873).
It can be written as a sum of positive squares in only one way, i.e., 75864100 + 4756761 = 8710^2 + 2181^2 .
It is a cyclic number.
It is not a de Polignac number, because 80620861 - 27 = 80620733 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (80620811) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40310430 + 40310431.
It is an arithmetic number, because the mean of its divisors is an integer number (40310431).
Almost surely, 280620861 is an apocalyptic number.
It is an amenable number.
80620861 is a deficient number, since it is larger than the sum of its proper divisors (1).
80620861 is an equidigital number, since it uses as much as digits as its factorization.
80620861 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 4608, while the sum is 31.
The square root of 80620861 is about 8978.9120164973. The cubic root of 80620861 is about 431.9987372077.
The spelling of 80620861 in words is "eighty million, six hundred twenty thousand, eight hundred sixty-one".
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