Base | Representation |
---|---|
bin | 111001001111… |
… | …0101000110111 |
3 | 2002110122212012 |
4 | 1302132220313 |
5 | 30140304121 |
6 | 2551114435 |
7 | 513036311 |
oct | 162365067 |
9 | 62418765 |
10 | 30009911 |
11 | 15a37988 |
12 | a072a1b |
13 | 62a9659 |
14 | 3db27b1 |
15 | 297bc5b |
hex | 1c9ea37 |
30009911 has 4 divisors (see below), whose sum is σ = 31589400. Its totient is φ = 28430424.
The previous prime is 30009907. The next prime is 30009919. The reversal of 30009911 is 11990003.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11990003 = 773 ⋅15511.
It is a cyclic number.
It is not a de Polignac number, because 30009911 - 22 = 30009907 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30009919) 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, 789716 + ... + 789753.
It is an arithmetic number, because the mean of its divisors is an integer number (7897350).
Almost surely, 230009911 is an apocalyptic number.
30009911 is a deficient number, since it is larger than the sum of its proper divisors (1579489).
30009911 is a wasteful number, since it uses less digits than its factorization.
30009911 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1579488.
The product of its (nonzero) digits is 243, while the sum is 23.
The square root of 30009911 is about 5478.1302467174. The cubic root of 30009911 is about 310.7574643628.
Adding to 30009911 its reverse (11990003), we get a palindrome (41999914).
The spelling of 30009911 in words is "thirty million, nine thousand, nine hundred eleven".
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