Base | Representation |
---|---|
bin | 1010110000111… |
… | …11100111000001 |
3 | 20021221001221001 |
4 | 11120133213001 |
5 | 141104311014 |
6 | 12543332001 |
7 | 2144411512 |
oct | 530374701 |
9 | 207831831 |
10 | 90307009 |
11 | 46a80aa1 |
12 | 262b1001 |
13 | 1592b900 |
14 | bdcaa09 |
15 | 7ddc974 |
hex | 561f9c1 |
90307009 has 27 divisors (see below), whose sum is σ = 106350633. Its totient is φ = 76632192.
The previous prime is 90307003. The next prime is 90307027. The reversal of 90307009 is 90070309.
The square root of 90307009 is 9503.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in 4 ways, for example, as 815409 + 89491600 = 903^2 + 9460^2 .
It is not a de Polignac number, because 90307009 - 25 = 90306977 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (90307003) by changing a digit.
It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2100142 + ... + 2100184.
Almost surely, 290307009 is an apocalyptic number.
90307009 is the 9503-rd square number.
90307009 is the 4752-nd centered octagonal number.
It is an amenable number.
90307009 is a deficient number, since it is larger than the sum of its proper divisors (16043624).
90307009 is a wasteful number, since it uses less digits than its factorization.
90307009 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 146 (or 73 counting only the distinct ones).
The product of its (nonzero) digits is 1701, while the sum is 28.
The cubic root of 90307009 is about 448.6494635929.
The spelling of 90307009 in words is "ninety million, three hundred seven thousand, nine".
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