Base | Representation |
---|---|
bin | 111010101111… |
… | …0100001111101 |
3 | 2010221121000221 |
4 | 1311132201331 |
5 | 30340432101 |
6 | 3020021341 |
7 | 522521653 |
oct | 165364175 |
9 | 63847027 |
10 | 30795901 |
11 | 16424464 |
12 | a391851 |
13 | 64c3336 |
14 | 4138dd3 |
15 | 2a84aa1 |
hex | 1d5e87d |
30795901 has 2 divisors, whose sum is σ = 30795902. Its totient is φ = 30795900.
The previous prime is 30795899. The next prime is 30795907. The reversal of 30795901 is 10959703.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 25999801 + 4796100 = 5099^2 + 2190^2 .
It is an emirp because it is prime and its reverse (10959703) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 30795901 - 21 = 30795899 is a prime.
Together with 30795899, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (30795907) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15397950 + 15397951.
It is an arithmetic number, because the mean of its divisors is an integer number (15397951).
Almost surely, 230795901 is an apocalyptic number.
It is an amenable number.
30795901 is a deficient number, since it is larger than the sum of its proper divisors (1).
30795901 is an equidigital number, since it uses as much as digits as its factorization.
30795901 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 8505, while the sum is 34.
The square root of 30795901 is about 5549.4054636510. The cubic root of 30795901 is about 313.4471352380.
The spelling of 30795901 in words is "thirty million, seven hundred ninety-five thousand, nine hundred one".
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