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6706189 = 72136861
BaseRepresentation
bin11001100101010000001101
3110121201011101
4121211100031
53204044224
6355423101
7111000400
oct31452015
913551141
106706189
113870506
1222b4a91
13150a579
14c67d37
158c7044
hex66540d

6706189 has 6 divisors (see below), whose sum is σ = 7801134. Its totient is φ = 5748120.

The previous prime is 6706187. The next prime is 6706207. The reversal of 6706189 is 9816076.

It can be written as a sum of positive squares in only one way, i.e., 4862025 + 1844164 = 2205^2 + 1358^2 .

It is not a de Polignac number, because 6706189 - 21 = 6706187 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6706181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68382 + ... + 68479.

It is an arithmetic number, because the mean of its divisors is an integer number (1300189).

Almost surely, 26706189 is an apocalyptic number.

It is an amenable number.

6706189 is a deficient number, since it is larger than the sum of its proper divisors (1094945).

6706189 is a wasteful number, since it uses less digits than its factorization.

6706189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136875 (or 136868 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 6706189 is about 2589.6310548030. The cubic root of 6706189 is about 188.5783926273.

It can be divided in two parts, 670 and 6189, that added together give a cube (6859 = 193).

The spelling of 6706189 in words is "six million, seven hundred six thousand, one hundred eighty-nine".

Divisors: 1 7 49 136861 958027 6706189