Base | Representation |
---|---|
bin | 10001010110100… |
… | …000100000111101 |
3 | 202021210001222202 |
4 | 101112200200331 |
5 | 1044011104041 |
6 | 44515321245 |
7 | 10133264003 |
oct | 2126404075 |
9 | 667701882 |
10 | 291113021 |
11 | 13a364581 |
12 | 815b0225 |
13 | 48408a34 |
14 | 2a93ca73 |
15 | 1a855a9b |
hex | 115a083d |
291113021 has 4 divisors (see below), whose sum is σ = 296047200. Its totient is φ = 286178844.
The previous prime is 291112999. The next prime is 291113023. The reversal of 291113021 is 120311192.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 291113021 - 218 = 290850877 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 291112984 and 291113002.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (291113023) 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, 2467001 + ... + 2467118.
It is an arithmetic number, because the mean of its divisors is an integer number (74011800).
Almost surely, 2291113021 is an apocalyptic number.
It is an amenable number.
291113021 is a deficient number, since it is larger than the sum of its proper divisors (4934179).
291113021 is an equidigital number, since it uses as much as digits as its factorization.
291113021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4934178.
The product of its (nonzero) digits is 108, while the sum is 20.
The square root of 291113021 is about 17062.0344918184. The cubic root of 291113021 is about 662.7563188082.
The spelling of 291113021 in words is "two hundred ninety-one million, one hundred thirteen thousand, twenty-one".
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