Base | Representation |
---|---|
bin | 111001001110… |
… | …0011101011101 |
3 | 2002110012121202 |
4 | 1302130131131 |
5 | 30140012424 |
6 | 2551005245 |
7 | 513001304 |
oct | 162343535 |
9 | 62405552 |
10 | 30000989 |
11 | 15a31207 |
12 | a069825 |
13 | 62a5585 |
14 | 3dad43b |
15 | 29792ae |
hex | 1c9c75d |
30000989 has 2 divisors, whose sum is σ = 30000990. Its totient is φ = 30000988.
The previous prime is 30000977. The next prime is 30001003. The reversal of 30000989 is 98900003.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 29920900 + 80089 = 5470^2 + 283^2 .
It is an emirp because it is prime and its reverse (98900003) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 30000989 - 212 = 29996893 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (30000589) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15000494 + 15000495.
It is an arithmetic number, because the mean of its divisors is an integer number (15000495).
Almost surely, 230000989 is an apocalyptic number.
It is an amenable number.
30000989 is a deficient number, since it is larger than the sum of its proper divisors (1).
30000989 is an equidigital number, since it uses as much as digits as its factorization.
30000989 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 1944, while the sum is 29.
The square root of 30000989 is about 5477.3158572425. The cubic root of 30000989 is about 310.7266650611.
The spelling of 30000989 in words is "thirty million, nine hundred eighty-nine", and thus it is an aban number.
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