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2685509 is a prime number
BaseRepresentation
bin1010001111101001000101
312001102211022
422033221011
51141414014
6133320525
731553321
oct12175105
95042738
102685509
111574732
12a96145
13730478
144dc981
15380a8e
hex28fa45

2685509 has 2 divisors, whose sum is σ = 2685510. Its totient is φ = 2685508.

The previous prime is 2685481. The next prime is 2685511. The reversal of 2685509 is 9055862.

2685509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 77284 = 1615^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685509 - 216 = 2619973 is a prime.

It is a super-3 number, since 3×26855093 = 58103339095812981687, which contains 333 as substring.

Together with 2685511, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2685539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342754 + 1342755.

It is an arithmetic number, because the mean of its divisors is an integer number (1342755).

22685509 is an apocalyptic number.

It is an amenable number.

2685509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685509 is an equidigital number, since it uses as much as digits as its factorization.

2685509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 2685509 is about 1638.7522692585. The cubic root of 2685509 is about 138.9981022117.

The spelling of 2685509 in words is "two million, six hundred eighty-five thousand, five hundred nine".