Number 81991

Representations of 81991
Greek numeral
ηMα͵αϡϟαʹ
Arabic numeral
٨١٩٩١
Roman numeral
LXXXMCMXCI
Maya numeral
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Chinese numeral
八万一千九百九十一
Hebrew numeral
פא׳ תתקצא
81991 in different numeral systems
Binary
10100000001000111
Base-3
11011110201
Base-4
110001013
Base-5
10110431
Base-6
1431331
Base-7
461020
Base-8
240107
Duodecimal
3b547
Hex
14047
Vigesimal
a4jb
Base-24
5m87
Base-36
1r9j
Negabinary
10100000001011011
Factorization
Prime factors
7, 13, 17, 53
Divisors
1, 7, 13, 17, 53, 91, 119, 221, 371, 689, 901, 1547, 4823, 6307, 11713, 81991
Sum of divisors other than 81991
26873
Product of prime factors
81991 = 7 x 13 x 17 x 53
Characteristics
Difference of 2 squares Odd Composite Deficient
Related primes
Prime number before 81991
81973
Prime number after 81991
82003