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128083333 = 718297619
BaseRepresentation
bin1111010001001…
…10010110000101
322221000022022011
413220212112011
5230242131313
620413134221
73113455540
oct750462605
9287008264
10128083333
11663329a4
1236a8a371
13206c7271
1413021857
15b3a093d
hex7a26585

128083333 has 4 divisors (see below), whose sum is σ = 146380960. Its totient is φ = 109785708.

The previous prime is 128083331. The next prime is 128083337. The reversal of 128083333 is 333380821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128083333 - 21 = 128083331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128083295 and 128083304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128083331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9148803 + ... + 9148816.

It is an arithmetic number, because the mean of its divisors is an integer number (36595240).

Almost surely, 2128083333 is an apocalyptic number.

It is an amenable number.

128083333 is a deficient number, since it is larger than the sum of its proper divisors (18297627).

128083333 is an equidigital number, since it uses as much as digits as its factorization.

128083333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18297626.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 128083333 is about 11317.3907328500. The cubic root of 128083333 is about 504.0777639415.

The spelling of 128083333 in words is "one hundred twenty-eight million, eighty-three thousand, three hundred thirty-three".

Divisors: 1 7 18297619 128083333