Base | Representation |
---|---|
bin | 1001110001010… |
… | …11001110000010 |
3 | 12201020022011002 |
4 | 10320223032002 |
5 | 131440402304 |
6 | 12044452002 |
7 | 2013461540 |
oct | 470531602 |
9 | 181208132 |
10 | 81965954 |
11 | 422a4264 |
12 | 2354a002 |
13 | 13c9b185 |
14 | ac58d90 |
15 | 72e131e |
hex | 4e2b382 |
81965954 has 8 divisors (see below), whose sum is σ = 140513088. Its totient is φ = 35128260.
The previous prime is 81965941. The next prime is 81965957. The reversal of 81965954 is 45956918.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a junction number, because it is equal to n+sod(n) for n = 81965899 and 81965908.
It is not an unprimeable number, because it can be changed into a prime (81965957) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2927342 + ... + 2927369.
It is an arithmetic number, because the mean of its divisors is an integer number (17564136).
Almost surely, 281965954 is an apocalyptic number.
81965954 is a deficient number, since it is larger than the sum of its proper divisors (58547134).
81965954 is a wasteful number, since it uses less digits than its factorization.
81965954 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5854720.
The product of its digits is 388800, while the sum is 47.
The square root of 81965954 is about 9053.5050670997. The cubic root of 81965954 is about 434.3880133361.
The spelling of 81965954 in words is "eighty-one million, nine hundred sixty-five thousand, nine hundred fifty-four".
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