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284808101 = 299820969
BaseRepresentation
bin10000111110011…
…101001110100101
3201211220202021012
4100332131032211
51040402324401
644132232005
710025554214
oct2076351645
9654822235
10284808101
111368485a6
127b46b605
134700c006
1429b7b07b
151a00c8bb
hex10f9d3a5

284808101 has 4 divisors (see below), whose sum is σ = 294629100. Its totient is φ = 274987104.

The previous prime is 284808091. The next prime is 284808133. The reversal of 284808101 is 101808482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101808482 = 250904241.

It can be written as a sum of positive squares in 2 ways, for example, as 180257476 + 104550625 = 13426^2 + 10225^2 .

It is a cyclic number.

It is not a de Polignac number, because 284808101 - 26 = 284808037 is a prime.

It is a super-3 number, since 3×2848081013 (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284808151) 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, 4910456 + ... + 4910513.

It is an arithmetic number, because the mean of its divisors is an integer number (73657275).

Almost surely, 2284808101 is an apocalyptic number.

It is an amenable number.

284808101 is a deficient number, since it is larger than the sum of its proper divisors (9820999).

284808101 is an equidigital number, since it uses as much as digits as its factorization.

284808101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9820998.

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 284808101 is about 16876.2585012200. The cubic root of 284808101 is about 657.9367007348.

The spelling of 284808101 in words is "two hundred eighty-four million, eight hundred eight thousand, one hundred one".

Divisors: 1 29 9820969 284808101