Base | Representation |
---|---|
bin | 1111100010000… |
… | …01110011110101 |
3 | 100002011120100222 |
4 | 13301001303311 |
5 | 231323333411 |
6 | 20532344125 |
7 | 3141320630 |
oct | 761016365 |
9 | 302146328 |
10 | 130292981 |
11 | 67602055 |
12 | 37775045 |
13 | 20cbbc50 |
14 | 13438c17 |
15 | b68a4db |
hex | 7c41cf5 |
130292981 has 16 divisors (see below), whose sum is σ = 169795584. Its totient is φ = 97023744.
The previous prime is 130292971. The next prime is 130292989. The reversal of 130292981 is 189292031.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-130292981 is a prime.
It is a super-2 number, since 2×1302929812 = 33952521795732722, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (130292989) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40565 + ... + 43658.
It is an arithmetic number, because the mean of its divisors is an integer number (10612224).
Almost surely, 2130292981 is an apocalyptic number.
It is an amenable number.
130292981 is a deficient number, since it is larger than the sum of its proper divisors (39502603).
130292981 is a wasteful number, since it uses less digits than its factorization.
130292981 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 84260.
The product of its (nonzero) digits is 7776, while the sum is 35.
The square root of 130292981 is about 11414.5950869928. The cubic root of 130292981 is about 506.9599759365.
The spelling of 130292981 in words is "one hundred thirty million, two hundred ninety-two thousand, nine hundred eighty-one".
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